Since it takes 1,000 tons of water to produce 1 ton of grain, it is not surprising that 70 percent of world water use is devoted to irrigation. (treehugger.com)
Do you have additional ideas on how to get students excited about world water? (schools.unicefkidpower.org)
It makes * no * sense to spend money to fix third - world water systems while happily letting children get addicted to something that will kill many of them. (realclimate.org)