Forest fires are burning nearly twice as many trees as they did just two decades ago, according to a study from the University of Maryland’s Global Land Analysis and Discovery laboratory. Researchers found that a typical forest fire season burns 3 million more hectares than in 2001. Forest fires accounted for a quarter of global tree loss in the past 20 years, according to a summation of the data produced by the World Resources Institute. In the United States this year alone, several large wildfires in California have burned nearly 200,000 acres and killed at least four people, according to data from CalFire. …In 2021 alone, 6.67 million hectares of tree cover were lost in boreal forests, compared with just 1.16 million hectares lost in tropical forests such as the Amazon.