, an online shopping portal dedicated to charitable giving, yesterday launched the Rainforest Site, a website that lets people protect 19.2 square feet of rainforest with a single click of the mouse, as often as once a day. A group of rotating site sponsors pay for donations to a Nature Conservancy program that purchases and protects rainforest land in Latin America and the Caribbean. The Rainforest Site is patterned after the Hunger Site, a successful website that lets visitors click to help alleviate hunger through a partnership with the U.N. World Food Programme.