U.S. cotton fiber records a net-negative cradle-to-gate carbon figure of -0.264 kilograms of CO2 per kilogram of fiber when temporary biogenic carbon flows are counted, the most extensive life cycle assessment of the fiber to date has found.

Cotton Incorporated commissioned WSP USA Inc. to conduct the assessment, which also confirmed the fiber's biogenic carbon storage properties. The LCA positions U.S.-grown cotton as a documented counter to petroleum-based synthetics at the raw-material tier of the apparel supply chain.

What does the on-farm data show?

Cotton Incorporated's 2023 National Resource Survey tracked four decades of practice change among American producers.

"Over the past four decades, U.S. cotton has reduced soil loss by 45 percent, improved irrigation water-use efficiency by 58 percent, reduced greenhouse gas emissions by 25 percent and improved land-use efficiency by 30 percent," said Jesse Daystar, Ph.D., vice president and chief sustainability officer at Cotton Incorporated.

Cover crop adoption climbed from 20% of grower respondents in 2015 to 48% in 2023, the same survey showed. No-till and strip-till use also rose between 2008 and 2023, while conventional tillage declined.

How are sourcing teams reading consumer signals?

Cotton Council International and Cotton Incorporated's 2025 Global Lifestyle Monitor Survey polled 13,026 respondents. Three in four (75%) said they prefer apparel made of cotton, cotton blends or denim. That compares with 7% for polyester, 5% for spandex and 4% for rayon.

The same survey found 59% of consumers worldwide willing to pay more for natural-fiber garments. India registered the highest premium tolerance at 85%, with Mexico at 66%.

Separately, 75% of consumers reported interest in sustainable clothing — 21% calling it essential and 54% nice to have. Eighty-three percent consider cotton and other natural fibers safe for the environment, while fewer than half say the same of rayon (48%), polyester (46%) or Tencel (41%).

What is the compliance backdrop?

The U.S. Environmental Protection Agency has measured that 85% of all textiles discarded in America go to landfill annually. Synthetic textiles, which now account for nearly 70% of global fiber production, shed microplastics during wear and washing, raising scrutiny under extended producer responsibility regimes spreading across EU member states and several U.S. states.

What supply-base scale sits behind the data?

More than 15,000 cotton farms operate across 17 U.S. states, with 98% family-owned, according to Liz Hershfield, executive director of Cotton USA™ and co-director of the U.S. Cotton Trust Protocol.

"There's a gap between how the fashion industry talks about responsible, regenerative agriculture and what's actually been happening on U.S. cotton farms for years," Hershfield said. "Growers have been absorbing difficult market conditions for several years now. Infrastructure built over generations erodes when demand isn't there to support it."

Daystar framed the fiber choice as upstream of every compliance claim a brand files.

"Apparel brands should care because the sustainability story of a garment starts with the fiber," Daystar said. "U.S. cotton gives brands a natural, trusted and data-backed fiber with a real story of continuous improvement from the farm forward."

What sourcing decision does the news force?

Mill buyers specifying natural fibers now have a third-party-verified LCA tying U.S. cotton to a net-negative cradle-to-gate footprint. Documented on-farm gains across soil, water and GHG metrics supply the evidence base that sourcing teams need to defend fiber substitutions before compliance, ESG and procurement committees.