Name: Mark Bradshaw
I have heard that in the last couple hundred years, before the
Industrial Revolution, that the carbon dioxide concentration in the atmosphere
was higher than it is today. Why has not global warming and the runaway
greenhouse effect occurred?
I do not know where you read this information. With regard to C02
levels of recent years, they seem to increase steadily. Some say the
greenhouse effect is happening right now, some say it is only appearing to
happen because of the location of weather stations-. There have been many
questions asked in this section with some very good answers for both sides.
Rather than summarizing them here, why do not you look through the global
warming questions and see if maybe your question has already been answered.
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Update: June 2012