Acid rain: What made Cap and Trade work

Acid rain began killing water organisms in Northeastern lakes, leaving them clear but lifeless. Biologist Sue Capone, who has monitored acid rain in the Adirondack Mountains for 30 years, takes a water sample from Owen Pond in New York.

Our series "We Used to Be China," continues with stories about our country confronting the environmental challenges that now bedevil China. Problems like… acid rain. It was the environmental crisis of the '80s, but a new Clean Air Act in 1990 greatly reduced the pollutants causing acid rain. It did so with something we now call Cap and Trade…setting a maximum level of pollutants and then letting industry decide how to get there.

Listen above for more.

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