Every summer, news reports portray fire-fighters struggling heroically to contain wildfires as they rage out of control in the American West, threatening homes and sometimes lives.
Most of us assume that these giant conflagrations, often started by lightning, are a normal part of the natural cycle. That's partly true--and partly wrong.
The worst fires tend to occur where enormous amounts of dead tinder have accumulated in thick stands of trees. In much of the American West, neither the trees nor… more