That's an extraordinary 1,000 fold increase.

这种1000倍的增长无疑是惊人的 。

North and South America, which are heavily wooded, saw a more than twenty-five fold increase in wildfires in the last half of the 20th century.

在森林大面积覆盖的北美和南美，20世纪后五十年中森林火灾数量增加了25倍。