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Some sceptics have argued that climate change is an entirely natural phenomenon caused by changes in the activities of the sun.
But a report in a Royal Society journal says that data on sun spot activity and cosmic rays shows the sun's impact on the climate since the mid-1980s has been a cooling one.
The lead author of the report, Dr Mike Lockwood, says instead of temperatures dropping, results show the opposite effect.
"Temperatures just keep marching on upwards," he said.
"And so we know that the solar effect over recent years has been completely negligible.
"We haven't seen any response in the temperatures that mean that the earth has cooled in response to a decrease in solar activity." © 2007 Australian Broadcasting Corporation
Posted July 11th, 2007 by Dinka
