Sunspots don't cause global warming, people do

Climate change denialists like to cite Danish scientist Henrik Svensmark's theory that global warming is caused by sunspots in excusing the ongoing de-terraforming of the Earth (Svensmark's work was the basis for a film called "The Great Global Warming Swindle"); but research from Lancaster University undermines Svensmark's conclusions.
The idea is that variations in solar activity affect cosmic ray intensity.

But Lancaster University scientists found there has been no significant link between them in the last 20 years.

Presenting their findings in the Institute of Physics journal, Environmental Research Letters, the UK team explain that they used three different ways to search for a correlation, and found virtually none.

This is the latest piece of evidence which at the very least puts the cosmic ray theory, developed by Danish scientist Henrik Svensmark at the Danish National Space Center (DNSC), under very heavy pressure.

Link (via Futurismic)