In 2011, the world will emit more than 35 billion tons of carbon dioxide. Every day of the year, almost a hundred million tons will be released into the atmosphere. Every second more than a thousand tons – two million pounds – of carbon dioxide is emitted from power plants, cars, trucks, ships, planes, factories, and farms around the world. The average citizen of the world will account for the release of four and a half tons – 9,000 pounds – of CO 2 this year. The average American will be responsible for four times as much, almost 18 tons, or 36,000 pounds of carbon dioxide this year, roughly a hundred pounds of carbon dioxide emissions for every day of the year.
While humans emit far less carbon dioxide than nature, the amount we emit exceeds the capacity of plants and oceans to absorb on top of the amount they’re already absorbing from natural sources. As a result, most of the carbon dioxide we emit remains in the atmosphere. Year over year, the atmospheric concentration of CO 2 creeps up. It will rise only half a percent in 2011, a seemingly tiny change. Yet tiny changes add up. Over the 50 years since 1960, the amount of carbon dioxide in the atmosphere has risen nearly 25%. Since the start of the industrial revolution it has risen by 45%, putting it at a level not seen in millions of years.
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