The New York Times notes an amusingly wacky Sierra Club website with tips on winning arguments about environmentalism over the holidays:

Are you likely to be the lone environmentalist at the dinner table sometime soon? Win arguments and influence people with this handy guide. You’ll find ready responses to the predictable dinner table arguments that’ll be directed at you, the nearest environmentalist. Who knows, you might even make a few converts!

• Spar a few rounds with grumpy Uncle Burt, whose personal virtues do not include conservation.

• Educate the sweet but confused Aunt Mim about the facts of global warming.

• Help wonkish Cousin Mervin get his priorities straight.

• And face off with the ever-feisty Sis who thinks you’re a lousy, no-good sell-out.