David Bornstein's WC3K contribution about Terrapass elicited an interesting response. Eric Carlson, president and co-founder of Carbonfund.org, wrote to remind us that his organization (a) is a non-profit (unlike Terrapass) and (b) charges less per ton of CO2 than other carbon offset services.
(And how do they do it? VOLUME! No, seriously -- they combine multiple offset donations to be able to purchase and retire large blocks of carbon credits from global carbon markets.)
I had mentioned Carbonfund.org in my post last month about the utility of carbon credits and carbon taxes, but they're clearly worth giving another look.
