Arsenic poisoning is no fun, as you can imagine. A 2007 study found that over 137 million people in more than 70 countries are probably affected by arsenic poisoning from drinking water. Link:  20 million people in China could be exposed to arsenic-contaminated water ; ;Related ArticlesBreaking the seed bank to feed the futureCrops can be made self-fertilizing with nitrogen-fixing bacteria, making artificial fertilizer unnecessaryGoogle co-founder Sergey Brin is investor in synthetic beef venture ;

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20 million people in China could be exposed to arsenic-contaminated water