Scientists have directly confirmed what they have long assumed to be true: Increasing amounts of greenhouse gases in the atmosphere, such as carbon dioxide, are trapping heat from escaping back into space and are thereby causing global warming
The observations of what is known as radiative forcing were made over the course of 11 years between 2000 and 2010 from two locations in North America, in Oklahoma and the North Slope of Alaska. Highly specialized instruments in both locations were used to measure thermal infrared energy fluctuations and analyze the source of such changes
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