Mother Jones: No one knows what started the Rim Fire, the 160,000 acre blaze that`s ripping through the western side of Yosemite National Park. But nearly 4,000 firefighters have been dispatched to try to stop it using helicopters, bulldozers, and flame retardants. Although the situation is starting to look up - 20 percent of the fire is now contained, up from 7 percent just two days ago -- the authorities predict the fire will keep spreading, and fast, in days to come.
There are many reasons to be concerned...