There is strong evidence that human-produced greenhouse gasesâ€”like carbon dioxide and methaneâ€”are changing the Earthâ€™s climate.
So says the President of the National Academy of Sciences, Ralph Cicerone.
He spoke about the science of climate change at the Saint Louis Science Center this week.
And Cicerone told St. Louis Public Radioâ€™s VĂ©ronique LaCapra that although the climate has changed in the past, this time is different.
St. Louis Public Radio is a service of the University of Missouri-St. Louis.