Knowing how conventional cotton is grown and denim is made, always-a-better-way outdoor apparel brand Patagonia has set out to change the industry. The company has partnered with chemical company Archroma on a new denim collection, launched this week — which is Fair Trade certified and said to use 84 percent less water, 30 percent less energy and 25 percent less CO2 compared to conventional denim dyeing processes — as well as a campaign telling us all about…