Toxicity

Here's how to recognize the role you might play in creating an unhealthy dynamic.
Secondhand smoke is toxic — especially to children.
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David Dunlap, a deputy in the EPA's Office of Research and Development, worked for chemical giant Koch Industries for more than eight years.
The environmental activist spoke out after reports the EPA may stop regulating two toxic chemicals seen in tap water.
A toxic chemical tainted one water well. Then another. Then another. Now black sediment spews from the taps.