Global warming is not caused by changes in the sun’s activity – cosmic ray theory no longer viable

I have written about various theories of global warming; the most widely accepted is that it is due to green house gas emissions mainly from fossil fuel, but as we cannot verify the cause of the climate warming by experimentation, there are plenty of alternative theories, where you can pay your money and take your choice. 

One theory is that climate change has nothing to do with carbon emissions but is caused by the sun’s cosmic rays which vary in intensity. The chief proponent of this theory is Henrik Svensmark of the Danish National Space Centre. It is also supported by scientists at the Armagh Observatory in Northern Ireland and builds on a discovery relating to water droplet cloud formation by C T R Wilson who won the Nobel Prize for Physics in 1927, so there is scientific provenance for this idea.  Continue reading