Environmental Toxins
Chemicals in plastics and other products seem harmless, but mounting evidence links them to health problems — and Washington lacks the power to protect us
Perchlorate
What It Is: An oxidant in rocket fuel
Found In: Drinking water, soil, some vegetables Health hazard Disrupts thyroid's hormone production
What You Should Know: Environmental groups are urging the government to lower perchlorate levels in drinking water
See the top 10 scientific discoveries of 2009.
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