As of 1995, only 17 percent of the world's land area remained truly wild ? with no human populations, crops, road access or night-time light detectable by satellite, the authors reported.
As of 1995, only 17 percent of the world's land area remained truly wild ? with no human populations, crops, road access or night-time light detectable by satellite, the authors reported.
作者指出，至一九九五年，全世界只有百分之十七的土地杳无人烟—无人居住、没有农作物、道路以及能被卫星侦测的夜间照明。