ClimateCooler.com is a website that promises to help consumers eliminate the global warming impact of their online purchases at over 400 ecommerce sites, including eBay. When a consumer starts their online shopping at ClimateCooler.com and completes the purchase at a participating store, the global warming impact of each purchase is calculated and a portion of the purchase price is returned by stores to Cooler to offset that impact.

Consumers who shop through ClimateCooler.com pay the same prices they would going directly to the retailer. According to the company, fees paid back to Cooler by the stores on its site are invested in renewable energy and pollution prevention projects.

http://www.climatecooler.com