Scientists are trying to figure out how to get carbon dioxide — the greenhouse gas that's warming the planet — out of the smokestacks of coal-burning power plants before it gets into the atmosphere.At the Massachusetts Institute of Technology's laboratory for energy and the environment, scientists have just finished a careful study of ways to trap and store carbon dioxide. It's called carbon sequestration.
MIT scientist Howard Herzog has been working on the carbon dioxide problem for years. He says that the world puts out more than 25 billion tons of carbon dioxide a year. On average, that's four tons for every man, woman and child on the planet. But Americans produce a lot more than the average, and that bothered Herzog.
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