A day after NBC blamed the California wild fires on global warming, CBS on Wednesday night cited global warming, but also gave equal emphasis to how years of putting out fires has provided more fuel for them in the form of thick trees and brush. From Escondido, California, anchor Katie Couric asserted the wild fires are “more intense today than ever, and John Blackstone reports, man may be at least partly to blame for that.” Blackstone first went to global warming: “Fire ecologist Tom Swetnam has a collection of tree rings that reveals thousands of years of climate history. He told Scott Pelley of 60 Minutes that global warming means a longer fire season.”
Then, however, Blackstone considered another cause: “A whole lot more fuel to burn, a result of a hundred years of fighting fires” since “putting out almost every fire is not what nature intended, says Richard Minnich, who studies fire history.” Minnich, a professor of earth sciences at the University of California Riverside, explained: “The fire suppression management over the hundred years, in fact, generates more severe fires than what would otherwise occur.” Plus, Blackstone noted, the destructive impact of the fires has increased because “the realization it's often good to let fires burn has met a big obstacle: more houses in forest and wild lands.” Concluding his piece, Blackstone returned to warming, but didn't blame it alone: “Firefighters are trying to keep up with the megafire threat, a threat that won't go away in a warming world, and a growing West.”