The environmental movement lacks a sense of humor. Too many greens resemble fire-and-brimstone preachers who threaten you with eternal damnation if you don’t clean up your act and come to Jesus. Activists have a point: Climate change, industrial pollution, and unfettered genetic modification technologies pose real threats to humanity. It’s hard to tell a joke … More Review: ‘Grumbles’ is a bit of fun at the greens’ expense