Reuters: Sarah Palin makes some greens see red, not least because her Alaskan home is a battleground in America’s “environmental wars.” One frontline is the Exit Glacier in Kenai Fjords National Park, which has been receding so fast that signs mark the years where it once stood — vivid testimony to climate change. The 1917 sign is now about a mile (1.6 km) from the imposing wall of ice. Alaska Gov. Palin has clashed with environmentalists by favoring shooting wolves from the air and …