Who made the global warming mess the world is now in? More than half of the world’s heat-trapping gases comes from three places: The United States, China and Europe.Once heat trapping gases get into the atmosphere, the effects are global. Trapping the sun’s energy doesn’t stop at national borders. But scientists can track where the gases come from and thus who is responsible.
But scientists say just looking at last year’s emissions doesn’t really show who caused the problem. That’s because carbon dioxide stays in the atmosphere for as much as 200 years or longer. So historic emissions matter. Since 1959, the United States has put more 334 billion tons of carbon dioxide in the atmosphere, about 21.5% of the global total.
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