In this interview, Sarah Perreard, co-founder of Earth Action, told Just Style why From Shedding to Solutions, a new report from Earth Action and The Nature Conservancy, treats production-phase microfibre pollution as the most tractable part of the problem, concentrated in a limited number of mills and treatment facilities rather than spread across millions of households. She explains why wastewater treatment and sludge management have to be paired rather than treated as separate fixes, and why the report’s baseline was only possible because brands, mills and researchers agreed to share data. Under Armour and Patagonia are also quoted on the case for coordinated, cross-value-chain action.