Due to acid rain caused by human activities, the drastic reduction of red spruce which is an important timber species in America has attracted general attention. However, in the study of acid rain’s effects and whether trees stored less carbon as a result of winter injury, an interesting result was come up with—red spruce has done quite well in the past 30 years. Researchers found that diameter grows fastest in ever records of red spruce, suggesting that it is now growing at almost two times the average for the last 100 years.
Scientists are eager to know whether it is given a credit by the Clean Air Act of 1990, which helped reduce sulfur and nitrogen pollution, or global warming has done a favor to it because for red spruce, warmer winter means less damage.
As far as I’m concerned, it is not the winner of global warming because other kinds of evergreen trees don’t benefit from a changing climate, which doesn’t make sense if red spruce is the only developing story. Nevertheless, what I’m sure is that the growth of red spruce trees did reduce the carbon dioxide produced by burning 280 million gallons of gasoline.