While Al Gore and his friends tell us that the science has been settled on global warming, science seems to think differently. Add this to the over 31,000 scientists that have signed a petition rejecting the theory of man-made global warming, and you get anything but settled science.

GOODBYE air pollution and smoky chimneys, hello brighter days. That’s been the trend in Europe for the past three decades – but unfortunately cleaning up the skies has allowed more of the sun’s rays to pierce the atmosphere, contributing to at least half the warming that has occurred.

Since 1980, average air temperatures in Europe have risen 1 °C: much more than expected from greenhouse-gas warming alone….Aerosol concentrations dropped by up to 60 per cent over the 29-year period, while solar radiation rose by around 1 watt per square metre (Geophysical Research Letters, DOI: 10.1029/2008GL034228). “The decrease in aerosols probably accounts for at least half of the warming over Europe in the last 30 years,” says Rolf Philipona, a co-author of the study at MeteoSwiss, Switzerland’s national weather service…

The latest climate models are built on the assumption that aerosols have their biggest influence by seeding natural clouds, which reflect sunlight. However, the team found that radiation dropped only slightly on cloudy days, suggesting that the main impact of aerosols is to block sunlight directly.