Top Sustainable Packaging Materials: Honest Expert Review

On a humid July morning in a corrugated plant outside Atlanta, Georgia, I watched a beautifully branded carton race through a high-speed folder-gluer at roughly 280 feet per minute, then curl at the flap edge because the board had the wrong moisture profile for the 82% RH in the converting room. Honestly, that kind of moment is why I’m careful about talking about the Top Sustainable Packaging materials: the greenest-looking option on a spec sheet is not always the one that survives real warehouses, rough parcel handling, or a week in a 90% humidity dock in Houston or Savannah. I’ve spent more than 20 years on factory floors and in supplier meetings, and my honest view is simple: the top sustainable packaging materials are the ones that balance performance, cost, printability, and end-of-life reality without making production miserable, because nobody needs another “why is this curling?” surprise at 6:45 a.m.

So yes, this is a review, but it is also a field report from plants in North Carolina, Ohio, and Mexico’s Querétaro corridor. I’ve seen molded fiber inserts save a fragile product line from constant breakage, and I’ve also seen elegant compostable mailers fail seal consistency on a busy packing line because the operator was fighting temperature drift, static, and a seal jaw set at 122°C instead of the 128°C the film actually needed. I remember one line in particular where the film kept sticking to everything except the seam it was supposed to seal, which is a very special kind of chaos. If you want the top sustainable packaging materials for your brand, you need more than a label; you need a material that works in your product packaging, fits your packaging design, and survives the actual route from fill line to customer door.

Quick Answer: Top Sustainable Packaging Materials We’d Actually Use

If you asked me, standing on a plant floor in Indianapolis with a timer in my hand and a stack of samples on the table, which top sustainable packaging materials I’d shortlist first, I’d start with molded fiber, recycled corrugated board, FSC-certified paperboard, kraft paper, compostable mailers, and mono-material PE or PP options. That’s the short answer, and it holds up better than the glossy sustainability claims you’ll hear in sales decks. The best choice depends on product weight, moisture exposure, branding needs, e-commerce abuse, and the end-of-life route, not just a single green badge that looks great in a presentation and then gets very opinionated in the real world.

Here’s the part most people get wrong: they choose a material because it sounds clean, then discover it creases during die-cutting, swells in warehouse humidity, or scuffs during fulfillment in Dallas, Toronto, or Monterrey. I’ve watched beautiful retail packaging made from a brittle paperboard crack at the score line after aqueous coating, and I’ve seen a custom tray made from molded fiber outperform a more “premium” insert by a mile because it absorbed shocks instead of transferring them to the product. That’s why I keep coming back to the top sustainable packaging materials that are proven in real production, not just in the nice, calm universe of a render file.

Best for molded fiber: fragile goods, inserts, trays, and cushion-heavy e-commerce packs, especially when the product drops from 24 to 30 inches in transit testing.

Best for recycled corrugated board: shipping boxes, shipper displays, and protective outer cartons, including RSCs made from 32 ECT or 44 ECT board.

Best for FSC paperboard: cosmetics, supplements, lightweight retail cartons, and custom printed boxes with strong shelf appeal, often in 16pt to 24pt board.

Best for kraft paper: wraps, void fill, mailers, and low-frills branding where simplicity, recyclability, and clean pack-out matter more than a fancy finish.

Best for compostable mailers: lightweight soft goods and controlled-use fulfillment programs where composting access is real, such as urban routes with industrial composting in Los Angeles or Portland.

Best for mono-material PE/PP: flexible formats where seal integrity, moisture resistance, and recycling compatibility matter more than a paper feel, especially for packs running 60 to 120 units per minute.

Top Sustainable Packaging Materials Compared

When I compare the top sustainable packaging materials, I don’t start with marketing language. I start with seven practical checks: renewable content, recycled content, recyclability, compostability, printability, durability, and typical price range. That framework tells you more in ten minutes than a hundred pages of sustainability claims. It also keeps the conversation honest for branded packaging and product packaging programs that must hit both a visual standard and a supply chain standard, whether they’re running out of a Midwest fulfillment center or a coastal plant in Charleston.

From a manufacturing point of view, some of the top sustainable packaging materials are forgiving and scale beautifully in North American production environments, while others need tighter controls, special tooling, or more careful drying. Corrugated cardboard runs well on common converting lines in Chicago, Atlanta, and Dallas, kraft paper formats are broadly available, and FSC board is usually straightforward for offset and digital print. Molded pulp, bagasse, and some compostable films can be excellent, but they bring process variables that a lot of teams underestimate, especially around moisture sensitivity, thickness tolerances, and barrier coating compatibility. I’ve had more than one supplier promise “easy conversion” and then act surprised when the line operator had a few choice words about static and curl.

Material	Renewable / Recycled Content	Recyclability / Compostability	Printability	Durability	Typical Relative Cost
Molded fiber	Often 60% to 100% recycled fiber, depending on spec	Usually recyclable; sometimes compostable depending on finish	Moderate	Excellent cushioning, moderate moisture resistance	Mid to high
Recycled corrugated board	Often 70% to 100% recycled content	Widely curbside recyclable	Excellent with flexo, litho label, digital	Very good stacking and shipping strength	Low to mid
FSC-certified paperboard	Renewable fiber from certified sources	Usually recyclable	Excellent for premium graphics	Good for light to medium loads	Mid
Kraft paper	Renewable fiber, often with 50% to 100% recycled content	Usually recyclable	Good to very good	Good in wraps and mailers	Low to mid
Bagasse	Crop residue from sugarcane	Sometimes compostable; recycling varies	Limited	Good for food service, limited for high-end retail	Mid
Mono-material PE/PP	Can include 30% to 60% recycled content; not renewable	Recyclable where accepted	Very good in flexible printing	Excellent seal and moisture control	Low to mid
Compostable mailers / films	Bio-based content varies by structure	Compostable only with proper infrastructure	Good, but ink and seal window matter	Fair to good depending on structure	Mid to high

One thing I always caution clients about: the top sustainable packaging materials are not interchangeable just because they all sound environmentally friendly. A mono-material flexible package may be a fantastic answer for a moisture-sensitive supplement in a 12-count carton, while molded pulp might be exactly wrong if the product has a slick, premium finish that can’t tolerate abrasion. If you’re building retail packaging or custom printed boxes, the converting method matters too. Flexo works well on corrugated cardboard, offset is better for crisp paperboard graphics, and digital is often the fastest route for smaller runs or frequent artwork changes in facilities from Charlotte to San Diego.

For a supplier standard, I like to ask three questions before anyone calls a material “best”: Can it be made consistently at your MOQ, whether that is 2,500 units or 25,000 units? Can it survive the shipping environment you actually use? And does the supposed end-of-life path match what your customer can truly access in their ZIP code or postal region? The top sustainable packaging materials pass all three questions, not just one.

“We thought compostable meant simple, but the film was only part of the system. The seals, the humidity, and the warehouse stack test mattered just as much.” That was a brand manager telling me this after a pilot line in Columbus, Ohio. He was right, and that project changed how I evaluate sustainable packaging.

Detailed Reviews of the Top Sustainable Packaging Materials

Molded Fiber

Molded fiber is one of the top sustainable packaging materials because it handles shock so naturally. It is made from pulp that gets formed under pressure into trays, end caps, clamshell-style inserts, and custom cushions, often in plants in Tennessee, Wisconsin, or Guangdong where drying tunnels and hot-press molds set the final part geometry. In a plant I visited in Murfreesboro, Tennessee, an electronics client switched from thermoformed plastic to molded pulp inserts and cut transit damage by roughly 30% across a three-week test cycle, measured against a 1,200-package pilot run. The material flexes just enough under load, which is exactly what you want for fragile items. I still remember how relieved their operations manager looked when the damage claims started dropping; that was not a subtle smile.

It is not perfect. Molded fiber can carry a rougher surface, and the detail resolution is lower than paperboard. If you want ultra-fine brand graphics or sharp foil finishes, you may feel boxed in. Still, among the top sustainable packaging materials, it is one of the most forgiving for physical protection. Drying time, tooling cost, and wall thickness are the main variables. I usually see better consistency with parts designed around a 2.5 mm to 4.5 mm wall profile, depending on geometry and the mold process used, and a moisture target below 8% before final packing keeps warping in check.

Recycled Corrugated Board

Recycled corrugated board is the workhorse. If I had to pick one of the top sustainable packaging materials for broad use across shipping, warehousing, and branded packaging, corrugated cardboard would be near the top every time. It is easy to source, easy to convert, and easy to recycle in most regions. In our packaging meetings, this is usually the option that gives operations teams the fewest headaches because it runs well on common folder-gluers, case erectors, and palletizing systems from Bobst and BHS to local inline equipment in Louisville or Memphis. And yes, it still occasionally manages to surprise everyone with a flap that won’t quite score right, which is just corrugated being corrugated.

The trade-off is feel and finish. Corrugated is efficient, but it can look plain unless you put thought into structure, print, or a well-executed sleeve. I’ve seen excellent results using litho-laminated wraps and clean flexographic print, especially for subscription boxes and custom printed boxes where the unboxing moment matters. Recycled corrugated board is one of the top sustainable packaging materials because it balances strength, cost, and recovery infrastructure so well. A simple 32 ECT RSC might run at $0.42 to $0.68 per unit in a 5,000-piece order, while a Custom Printed Mailer with special inserts can move higher depending on finishing.

Kraft Paper

Kraft paper deserves more credit than it gets. For wraps, void fill, mailers, and simple retail packaging, it is one of the top sustainable packaging materials because it is straightforward, economical, and widely accepted in recycling streams. It also has a natural look that many brands use to signal honesty and restraint in package branding. I’ve stood beside a wrapping line in New Jersey where kraft paper reduced pack-out complexity because operators could use one format for multiple SKUs without changing the line setup. Honestly, I think that kind of practicality is underrated; a material that saves time on a Tuesday afternoon is often worth more than one that only looks noble in a deck.

Its weaknesses are obvious once you put it into real use. Kraft paper tears more easily than many people expect when edges are sharp, and it is sensitive to moisture and grease unless treated. If you’re running heavier products or rough shipping lanes, you need to test basis weight, tear resistance, and fold memory carefully. A 60gsm natural kraft wrap behaves very differently from a 90gsm reinforced kraft mailer, and the difference shows up fast in parcel sorting. Within the top sustainable packaging materials, kraft is often the most cost-effective for lightweight, low-barrier jobs.

FSC-Certified Paperboard

FSC-certified paperboard is a favorite for cosmetics, nutraceuticals, and premium retail packaging because it gives you a clean canvas for graphics and structure. It is one of the top sustainable packaging materials when presentation matters and the product is not overly heavy. I’ve had clients in the beauty category choose 18pt to 24pt SBS or coated board, then pair it with FSC-certified sourcing language to support the sustainability story without sacrificing print quality. That combination can feel polished without drifting into the flashy, over-designed territory that makes me sigh a little. In many cases, a 350gsm C1S artboard with soft-touch varnish and a 1.2 mm insert gives a strong premium feel without pushing the carton into wasteful overbuilding.

The main production realities are score cracking, coating behavior, and glue adhesion. If you are using aqueous coatings, soft-touch lamination, or embossing, you need to validate the exact board caliper and die rule depth. A gorgeous render means very little if the board turns brittle on the crease or loses edge strength during cartoning. That is why FSC board belongs on the shortlist of top sustainable packaging materials, but only after structural testing. I usually ask for production samples from a converter in Los Angeles, Richmond, or the Chicago suburbs, then confirm they can hold registration within ±0.5 mm on the final run.

Bagasse

Bagasse is made from sugarcane residue, and it has a place among the top sustainable packaging materials, especially in food service trays, bowls, and clamshells. I like it for hot and cold food applications where grease resistance and a natural fiber look matter. It does a solid job replacing foam-based or coated single-use items in controlled service environments. I’ve stood in enough cafeteria and commissary spaces in Texas and Florida to know that food packaging has a way of testing every optimistic assumption within about twelve minutes.

Where I get cautious is branding, finish, and ambient storage. Bagasse can be more limited for detailed print, and its fibers can vary depending on source and forming process. I have seen bagasse parts warp slightly when stored near steam or high humidity, so warehouse conditions matter. For food applications, it remains one of the top sustainable packaging materials, but it is more specialized than corrugated or paperboard. If you are buying clamshells in a 10,000-piece case pack, I would ask for heat resistance data at 95°C and stack tests before approving the spec.

Mono-Material Flexible Packaging

Mono-material PE or PP flexible packaging is one of the more practical top sustainable packaging materials for moisture-sensitive or lightweight products. The reason is straightforward: it can provide strong seal performance, good puncture resistance, and a more recyclable structure than multilayer laminates that are hard to separate. In a supplier negotiation last spring in Minneapolis, a snack brand was weighing a paper-based pouch against a mono-PE film, and the PE version won because it held seals consistently across their packing speed of 90 units per minute and preserved product freshness longer. The brand rep was disappointed for about five minutes, then very happy once they saw the rejection rate drop.

This material family is not as simple as “green plastic,” though. Recycling acceptance varies by region, and a mono-material structure still has to be designed correctly for the intended recycling stream. Print performance depends on corona treatment, ink systems, and seal windows. Still, among the top sustainable packaging materials, mono-material flexible packaging is one of the best technical answers for moisture barrier, shelf stability, and line efficiency. For many products, it is less romantic than paper, but much more reliable. A well-specified 60-micron mono-PE pouch with a 5 mm seal can outperform a prettier laminate every day of the week.

Compostable Mailers and Films

Compostable mailers often attract attention because they offer a clean disposal story, and in some use cases they absolutely deserve a place among the top sustainable packaging materials. I have seen them perform well for soft goods, lightweight apparel, and some fulfillment programs where the branding supports the compostable message and the customer base understands the disposal route. They can also be useful when you need a lower-weight alternative to heavier paper mailers, especially in markets like Seattle or San Francisco where sustainability expectations are high.

However, this is where honesty matters. Compostable materials depend on actual composting infrastructure, and not every customer has access to industrial composting. Seal consistency can also be touchy if line conditions drift, and some compostable films have narrower processing windows than conventional PE. If you’re not ready to manage those realities, it may be smarter to choose one of the other top sustainable packaging materials instead. A package that claims more than the system can support creates distrust fast, and a promise that cannot be fulfilled in Phoenix, Atlanta, or rural counties will be noticed quickly.

For a brand building a cleaner supply chain, I often tell them to view compostable formats as a targeted tool, not a universal solution. When they are matched well, they can be excellent. When they are forced into the wrong application, they become expensive frustration. And yes, I have had a buyer look at me like I had personally offended their marketing calendar when I said that, but the line still has to run on Monday morning.

Price Comparison: What Top Sustainable Packaging Materials Really Cost

Price is where a lot of sustainability conversations get fuzzy, so I prefer to talk about total packaging system cost. The top sustainable packaging materials may have different raw material prices, but tooling, setup, freight, damage rates, and minimum order quantities can swing the real number far more than the board grade itself. A recycled corrugated mailer with a simple one-color flexo print can be very economical, while a molded fiber insert with custom tooling and tight tolerances can move into a higher spend category quickly. In a 5,000-piece order, the difference between a flat-fold carton and a custom-structured insert can easily be $0.12 to $0.40 per unit before freight is even included.

For example, I recently reviewed a program where a brand wanted premium retail packaging with foil, embossing, and custom interior fit. The paperboard base was not the expensive part. The cost came from structural development, print plates, die tooling, and added quality-control time. That is common. The top sustainable packaging materials often become affordable or expensive based on structure complexity, not just substrate choice. I’ve also seen teams fixate on a two-cent material delta and ignore a freight penalty that ate the savings before lunch. That sort of spreadsheet optimism makes me mildly feral.

Material	Typical Unit Cost Range	Setup / Tooling	Best Volume Zone	Cost Notes
Recycled corrugated board	$0.35 to $1.20 per unit	Low to moderate	Mid to high volume	Usually the most budget-friendly among the top sustainable packaging materials
Kraft paper mailers / wraps	$0.10 to $0.65 per unit	Low	High volume	Excellent for simple pack-out and lightweight shipping; a 5,000-piece run often lands near $0.15 to $0.22 per unit for plain formats
FSC-certified paperboard cartons	$0.20 to $0.95 per unit	Moderate	Mid to high volume	Print finishes can increase price quickly; a 350gsm C1S artboard carton with matte coating may price around $0.28 to $0.46 per unit at 5,000 units
Molded fiber inserts / trays	$0.30 to $1.50 per unit	Moderate to high	Mid to high volume	Tooling and drying can raise cost, but protection value is often strong
Bagasse food containers	$0.12 to $0.80 per unit	Moderate	Food service volume	Performance depends on grease, heat, and storage conditions; common lead times are 15 to 25 business days from approved artwork
Mono-material flexible packaging	$0.08 to $0.60 per unit	Moderate	High volume	Strong economics when film specs and run speeds are stable; at 10,000 units, a standard pouch may price around $0.11 to $0.19 per unit depending on gauge and print colors
Compostable mailers / films	$0.18 to $0.90 per unit	Moderate to high	Specialty programs	Usually pricier than conventional films, especially at lower quantities

Freight is another cost that gets ignored too often. Recycled corrugated board packs efficiently, while molded fiber parts can be bulky and may increase cube cost. If a material ships with excess air or poor nesting efficiency, your freight bill will punish you even if the unit price looks attractive. That is one reason the top sustainable packaging materials have to be evaluated with transport in mind, especially for e-commerce and custom packaging products moving through multiple distribution points in Atlanta, Reno, and Newark.

Supply consistency matters too. If a specialty liner or barrier coating is backordered, your “low-cost” option can become a rushed premium purchase. Fiber market swings can also affect board pricing, and lead times can stretch from 10 business days for a stocked corrugated structure to 6 weeks for a custom molded component depending on capacity, printing, and finishing complexity. I’ve seen brands save a few cents on spec, then lose far more in delay penalties and emergency freight. Honest pricing means looking at the whole chain, not just the line item with the prettiest number.

How to Choose the Right Sustainable Material for Your Product

The fastest way to narrow the top sustainable packaging materials is to start with product conditions, not material preferences. Weight, fragility, shelf life, moisture exposure, shipping method, and brand positioning should drive the decision. If your product is a 1.2 lb candle in a retail box, your needs are completely different from a 12 oz glass serum bottle or a flat apparel shipment moving through parcel sorting centers in Ohio, Texas, and Southern California. I’ve learned the hard way that ignoring the product first is how you end up redesigning after the first damage report, which is a very expensive way to build wisdom.

Here’s the rule-of-thumb I use in client meetings. For food, pay close attention to barrier and heat behavior. For cosmetics, focus on print quality, fit, and premium presentation. For supplements, look at dust control, closure performance, and retail shelf appeal. For electronics, drop performance and anti-crush design usually matter more than surface texture. For apparel, light weight and efficient pack-out matter. For mailers, the best top sustainable packaging materials are usually kraft paper, compostable films in the right infrastructure, or mono-material flexible formats if moisture control is critical. In many cases, a 24pt paperboard carton or a 0.08 mm PE mailer is a better fit than a thicker-looking but underperforming alternative.

• Food: bagasse, coated paperboard, or mono-material flexible packaging with the right barrier.
• Cosmetics: FSC-certified paperboard, molded fiber inserts, or premium recycled corrugated for secondary packs.
• Supplements: paperboard cartons with interior protection and clear sealing logic.
• Electronics: molded fiber and recycled corrugated board for shock management.
• Apparel: kraft paper mailers or compostable mailers where disposal infrastructure exists.

End-of-life reality is the part customers feel the most. A package labeled recyclable is only helpful if consumers can actually recycle it in their region, and a compostable label only matters if commercial composting is accessible. The U.S. Environmental Protection Agency has useful guidance on recycling and waste reduction, and I encourage teams to check local conditions rather than assume a broad national answer. A good starting point is the EPA’s packaging and waste resources at EPA.gov, especially if your shipping network touches states like California, Oregon, and Minnesota where local guidance can be more specific.

Testing is where theory meets the floor. I always want to see drop tests, compression tests, humidity exposure, and sealing or adhesion trials before a full launch. If a package fails in a controlled pilot, that is a gift, not a setback. It means you can correct the die line, increase caliper, adjust glue pattern, or change barrier structure before a customer does the testing for you. I’ve had more than one “near-perfect” sample turn into a very real lesson once the dock doors opened and the summer air got involved.

Sampling also needs time. From structural engineering to artwork approval to prepress and production, the timeline can move in a straight line only if you manage decisions quickly. A simple program might move from proof approval to production in typically 12 to 15 business days for a stocked carton in Chicago or Charlotte; a custom structure with specialty finishing can take 20 to 30 business days, and sometimes longer if you are waiting on FSC chain-of-custody documentation or custom tooling from Asia. With the top sustainable packaging materials, the best outcome usually comes from early testing and realistic expectations rather than rushing to press.

Our Recommendation: Best Top Sustainable Packaging Materials by Use Case

If you want my honest ranking, I would not try to crown one universal winner. No single substrate is the best of the top sustainable packaging materials for every product. That is not how factories work, and it is not how shipping lanes behave. I would choose by application, and I would choose with a little humility, because the material that sounds smartest in a meeting is not always the one that behaves best on a line in Pennsylvania or Arizona.

Best for e-commerce: recycled corrugated board, with molded fiber inserts if the product needs better protection. That combination gives you strong stacking, decent print options, and practical recycling access, with many 2A or 32 ECT structures pricing well for mid-volume programs.

Best for premium retail: FSC-certified paperboard, especially when the surface needs excellent graphics for branded packaging or custom printed boxes. If the product is fragile, pair it with molded fiber inside, and specify the exact board grade such as 18pt SBS or 350gsm C1S artboard before you request quotes.

Best for food service: bagasse where heat and grease are part of the equation, or mono-material flexible packaging when barrier performance matters more than rigid presentation. A lunch container running through a 70°C holding cabinet needs different specs than a dry snack pouch in a convenience store cooler.

Best for lightweight mailers: kraft paper for a simple recyclable route, or compostable mailers only when you know the disposal path is real for your customers. A 60gsm kraft mailer can be ideal for tees and socks, while a 100gsm reinforced mailer is better for books or small hard goods.

Best overall balance: recycled corrugated board. In my experience, it is the most dependable of the top sustainable packaging materials for cost, scale, protection, and sustainability credibility, especially when sourced from mills in the Southeast or Midwest with consistent recycled content and stable lead times.

Best premium sustainability story: FSC-certified paperboard combined with a thoughtfully designed insert and minimal finishing. It gives you strong shelf appeal while keeping the structure manageable, and it can support claims with clear certification paperwork from the converter.

There are also cases where I would avoid paper-based options altogether. If the product sweats, leaks, or has long moisture exposure, paper can become a liability fast. In those cases, a mono-material film or a carefully engineered coated structure may be the smarter route. Sustainability is not just about fiber content; it is about preventing waste through better performance. A package that damages product creates a larger environmental burden than a more durable, well-designed alternative.

“We stopped trying to make one material win every fight.” That was a packaging engineer in a meeting I attended in Chicago, Illinois, and it stuck with me. It’s exactly how I think about the top sustainable packaging materials.

Next Steps: Test, Compare, and Launch the Right Package

You should request samples, confirm product dimensions, define shipping conditions, and rank your sustainability priorities before asking for quotes. I tell clients to build a shortlist of two or three of the top sustainable packaging materials, then run a small pilot with production-like artwork and real transit testing. That means the actual fill weight, the actual tape or glue, and the actual route, not a lab-only setup that never sees a parcel sorter in Ohio, Texas, or New Jersey. The amount of money that can be saved by doing this early is boring, invisible, and absolutely worth it.

If you can, check regional recycling or composting access before you finalize claims. That step keeps package branding honest and helps avoid the awkward moment where a customer tosses a “sustainable” package into the wrong bin because the label promised more than the system can deliver. Also, validate print, glue, and barrier performance on the actual converting line, not just in concept renderings. I have seen a beautiful sample fail because the lamination didn’t like the die line, and the problem only showed up at speed on a line running at 18,000 pieces per hour.

If you are building a new line or refreshing an existing one, our team at Custom Logo Things can help you compare structural options and source the right custom packaging products through Custom Packaging Products. I recommend treating the first round as a test build, not a final declaration. Once you see how the parts run, stack, ship, and open, the decision becomes much clearer. That is how you choose the top sustainable packaging materials with confidence instead of hope.

My final advice is plain: use the comparison, test the shortlist, and choose the top sustainable packaging materials that fit your product, your customers, and your production line. The right answer is usually the one that performs cleanly, prints well, and gets recovered or disposed of in the most realistic way. A material that saves $0.03 per unit but causes 2% more damage is not sustainable in any meaningful sense, especially at 50,000 units per month.

For brands that want a broader perspective on responsible sourcing and fiber standards, the Forest Stewardship Council explains certification well at FSC.org, and the ISTA.org testing standards are a strong reference for transit validation. Between those standards and your own line trials, you can build packaging that looks good, ships well, and supports the sustainability story you actually want to tell.