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Comments and Teaching Tips given for What is the Greenhouse Effect? Comment on this resource

Sep 16, 2009 by vicki Osis, retired
This activity has outdated information, such as, "C02 stays in the atmosphere for 10-20 years." I am reading that scientists now think it stays for a century or more. Also they downplay the significance of methane. This currently (2009) is one of the worries with climate change. Methane is being released at an increasing rate from melting tundra and recently discovered bubbling up in the Arctic seas.