Ecological savings

I just found this link where you can enter a quantity of t-shirts and it will calculate the "ecological savings" of purchasing hemp t-shirts rather than a shirt made from cotton grown with pesticides. For 20 shirts, which most of us will use in the next 10 years, the savings in water is 14,900 gallons. The savings in terms of chemical fertilizer is 3.36 pounds. The savings in terms of pesticides is .02 pounds. That just for 20 shirts!! Here's the link, it's in about the middle of the page: http://www.threehighguys.com/theguys/Ecological.html