FARALLON NATIONAL WILDLIFE REFUGE, Calif. On these craggy, remote islands west of San Francisco, the largest seabird colony in the contiguous United States throbs with life. Seagulls swarm so thick that visitors must yell to be heard above their cries. Pelicans glide. But the steep decline of one bird species for the second straight year has rekindled scientists fears that global warming could be undermining the coastal food supply, threatening not just the Farallones but entire marine ecosystems. [blah blah blah] Climatologists describe global warming as a worldwide rise in temperatures caused by the buildup of carbon dioxide and other...
