The biggest challenge here is irrigation, which consumes 70% of the world's fresh water.
出自-2016年6月閱讀原文
Millions of irrigation wells in many countries are now pumping water out of underground sources faster than rainfall can refill them.
出自-2016年6月閱讀原文
Millions of irrigation wells have significantly lowered water tables in almost every state.
出自-2016年6月閱讀原文
As water tables have fallen and irrigation wells have gone dry, China's wheat crop, the world's largest, has declined by 8% since it peaked at 123 million tons in 1997.
出自-2016年6月閱讀原文
When this water is used for agricultural irrigation, farmers risk absorbing disease-causing bacteria, as do consumers who eat the produce raw and unwashed.
出自-2016年6月閱讀原文
Most of these operations draw irrigation water from local rivers or lakes.
出自-2016年6月閱讀原文
Irrigation is the primary agricultural use of human waste in the developing world.
出自-2016年6月閱讀原文
In poor, dry regions, untreated wastewater is the only viable irrigation source to keep farmers in business.
出自-2016年6月閱讀原文
Facing water shortages and escalating fertilizer costs, farmers in developing countries are using raw sewage ( ' , 下 水道污水) to irrigate and fertilize nearly 49 million acres of cropland, according to a new report—and it may not be a bad thing.
出自-2016年6月閱讀原文
Better irrigation can dramatically improve crop yield and about 40% of the world's food supply is currently derived from irrigated land.
出自-2013年12月閱讀原文
Facing water shortages and escalating fertilizer costs, farmers in developing countries are using raw sewage to irrigate and fertilize nearly 49 million acres of cropland, according to a new report—and it may not be a bad thing.