Millions ofirrigation wells in many countries are now pumping water out of underground sources faster than rainfall can refill them.
在许多国家，数以百万计的灌溉井现在从地下水源抽水的速度，超过了降雨所能再次填满的速度。
2
Irrigation: No untreated sewage water may be used for irrigation. Irrigation methods should take into consideration sustainability of the watersources and the quality of the water.
灌溉：任何没有经过处理的污水沟都不能用于灌溉。使用的灌溉方法要考虑到水资源的可持续性和水的质量。
3
Irrigation methods should take into consideration sustainability of the watersources and the quality of the water.