Reuters: While many people dream of becoming a rock star, Pearl Jam guitarist Stone Gossard says he is trying to be more of a businessman to help slow climate change. The U.S. band, which has sold 60 million albums since 1991, said Monday it was investing $210,000 to plant trees in Washington State to soak up an estimated 7,000 tonnes of carbon dioxide linked to a 32-date 2009 tour. "Pearl Jam is a band but we are also a business," guitarist and co-founder Gossard told Reuters in a …