Agriculture currently covers ______ of earth's land area posing the biggest threat to our regional water supplies.
A. 37%
B. 63%
C. 3.6%
D. 4.4%
查看答案
3% of potentially usable freshwater only less than ______ available for sustainly all life on earth.
___________ goes to the wide range of factories which make the products we buy each day.
This limited supply isn't distributed evenly around the globe.
A. 对
B. 错
According to the video, may our planet run out of water?