The rates of extinction of local species that accompany these rapid changes in land cover may soon be far in excess of what is found today, reaching as high as 10, 000 times the natural background rate.

• 伴随着这些士地覆盖的迅速变化，当地物种灭绝的速率可能很快便大大超过了我们今天所发现的，达到自然的1万倍。