与流行的观念相反,美国的树木不是越来越少。事实上,从上世纪40年代以来,美国森林的生长量一直超过采伐量。美国每年种树20亿株,现在的森林覆盖率比1920年增加了33％。林产行业拥有约15％的林地,负责41％的造林任务,平均每天植树300万株。加拿大林业也很发达,造林能力在不断加强。 Contrary to popular belief, the United States has fewer and fewer trees. In fact, since the 1940s, the growth of forests in the United States has consistently exceeded the amount harvested. With 2 billion trees planted each year in the United States, the present forest coverage rate has increased by 33% over 1920. The forestry industry owns about 15% of the forest land, is responsible for 41% of afforestation tasks, and plants an average of 3 million trees a day. Canada’s forestry is also very developed, afforestation capabilities continue to strengthen.