Study: No cosmic rays, cloud link to warming

Findings undermine claim that temperature increases are due to sun

Skeptics who argue that global warming is caused by cosmic rays rather than manmade greenhouse gases have been dealt another blow.

Some who question the human-induced global warming scenario argue that changes in the intensity of these rays, which are caused by variations in solar activity, affect the cloud cover of the Earth, allowing heat from the sun to build up, and accounting for the rise of global temperatures in recent years.

But a new study detailed in the Institute of Physics