either Patagonia or The Gap (maybe both) did an environmental impact analysis in the late '90's and were surprised to discover that cotton had the biggest negat

either Patagonia or The Gap (maybe both) did an environmental impact analysis in the late '90's and were surprised to discover that cotton had the biggest negative impact. I don't recall the exact reason or numbers but it sounds like someone needs to do another analysis on total cost of production for each material.