New York Times: The huge wildfire scorching one of Americas most beloved national parks, Yosemite, has rained ash on San Franciscos water supply and jolted the nation. Experts say this is just a foretaste of major fires to come, in the United States and much of the world. Increasing incursions by humans into forests, coupled with altered forest ecology and climate change, will make fires bigger and more destructive, with implications for air quality as well as homes and infrastructure. We face the increased...