Many of you might have read the news about Patagonia this week. The brand is trying to create an impact in the polluting apparel market. Did you know a dyed cotton shirt is estimated to have up to 5.5 KG CO2 eq. of greenhouse gas emissions during its production. A lot of the energy put into these production systems is also lost in the process. With the right systems in place a lot of this excess heat could still be used. Estimate what percentage of the energy put into apparel production is lost.