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In a letter to The Day, "What of past warming?" (Feb. 20), the author mistakenly writes that global warming is not influenced by the human activities around the world. The overwhelming evidence from the scientific community indicates that the author's analysis is incorrect. The Intergovernmental Panel Change (IPCC) Fifth Assessment Report and the IPCC press release of September 2013, concludes: "Human influence on the climate system is clear. This is evident in most regions of the globe. . . It is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century."
While it is true the Earth has experienced warmer geologic periods, as well as colder periods during the last billion years or so, that does not, therefore, suggest that mankind is not currently warming the climate of our planet today.
Yes, do your research, but get it right! President Obama, Secretary of State Kerry, and the climate science/policy community have it right. We need to bring greenhouse gas emissions under control and prepare for adapting to a warmer climate here at home and around the world.