植树造林可延缓地球变暖美国林业专家说，植树造林对于抵消全球变暖可以发挥重要作用。美国宾夕法尼亚大学森林水文学教授戴维·德瓦尔说，在城区植树可以使大气中的二氧化碳含量减少５％。他在芬兰参加国际林业会议时说：“这个百分比虽然不很大，但总可以在人们居住的地... Afforestation Can Slow Global Warming US forestry experts say afforestation can play an important role in offsetting global warming. David Dewar, a professor of forest hydrology at the University of Pennsylvania in the United States, says planting trees in urban areas can reduce atmospheric levels of carbon dioxide by as much as 5%. When he attended the International Forestry Conference in Finland, he said: "Although this percentage is not very large, it can always be found in places where people live.