AOL News: "It’s been a tough year," writes environmentalist Bill McKibben on the website 350.org. "In North America, oil gushing into the Gulf of Mexico; in Asia, some of the highest temperatures ever recorded; in the Arctic, the fastest melting of sea ice ever seen; in Latin America, record rainfalls washing away whole mountainsides. "So we’re having a party." That’s the idea behind 350.org’s Global Work Party on Sunday — 10/10/10 — when more than 1 million people around the …