For Eco-conscious web-hosting I recommend GreenGeeks.com. They offer great bargain packages as well as advanced webs services and a free domain name for the life your account. Since I am an affiliate with GreenGeeks, if you purchase hosting using the link above you will also be giving a gift to me.
“In order to compensate for the polluting power we pull from the grid we purchase wind energy credits for the energy we consume from the grid. In fact we replace, with wind power, 3 times the amount of energy used by our servers, so if we pull 1X of power from the grid we purchase enough wind energy credits to put back into the grid 3X of power having been produced by wind power.” – GreenGeeks.