Global Warming is not due to human contribution of Carbon Dioxide

I read an excellent article by Canadian climatologist Timothy Ball today. A few excerpts:

Believe it or not, Global Warming is not due to human contribution of Carbon Dioxide (CO2). This in fact is the greatest deception in the history of science. We are wasting time, energy and trillions of dollars while creating unnecessary fear and consternation over an issue with no scientific justification.

So what is causing the ever-so-slight warming trend?

The world has warmed since 1680, the nadir of a cool period called the Little Ice Age (LIA) that has generally continued to the present. These climate changes are well within natural variability and explained quite easily by changes in the sun. But there is nothing unusual going on.

The only thing unusual going on is the mass hysteria caused by the global warming zealots.