淡水

When it comes to the protection of water, People may know about the importance of doing it, but few people know about that March 22 is the world water day.

获取正在被拖往从人口稠密地区和世界干旱地区的冰川淡水概念曾一度被认为是一个笑话更适合于卡通画，而非现实生活。但现在它正相当认真地考虑了许多国家，特别是因为科学家们警告说，人类将会超过其淡水供应速度比它耗尽食物。 冰川是淡水的来源，可能直到最