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Global warming
Is global warming caused by solar radiation or greenhouse gases? Is there any evidence of increased solar radiation?
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No best answer has yet been selected by cliffie47. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.The way I understand it is based on an energy balance. Solar radiation enters the atmosphere and hits the earth. Some of this energy is reflected back out of the atmosphere. Greenhouse gases tend to trap this heat so that it cannot escape the atmosphere, causing temperatures to rise. I don't think there is an actual increase in solar radiation input from the sun.