At an age when most of his peers are worrying about driver's licenses and the SAT, Alec Loorz is tackling some weightier challenges. This week, for example, he's suing the U.S. government in an effort to fight climate change. And right after that, he'll lead what's being billed as a "Million Kid March" in 25 countries. "I think it's awesome," the 16-year-old environmental activist and founder of Kids vs. Global Warming said by phone from his home in Oak View. "We don't have political power. We don't have the money to compete with corporate lobbyists. We can't vote. All we...