McClatchy Newspapers: The Forest Service has struggled for years to pay for fighting fires that last year alone scorched almost 10 million acres. As fire seasons grow longer and the blazes more intense in forests stressed by global warming, the agency’s funding woes mount. In fact, the Forest Service has already spent roughly $900 million this year, almost 75 percent of its fire suppression budget, and the season is just nearing its peak. Nearly half the Forest Service’s annual budget is now spent …