It's the sun

Many dismiss the role of the sun in climate change. It is a stance that would be laughable if it was not so asinine.

The Sun obviously must play a significant role in ongoing climate change. The sun has variability in terms of movement, size, and output over millions of years and this must effect the earth's climate. For example the sun's magnetic field goes through an eleven year cycle.

Sunspot activity waxes and wanes through cycles as a result. And these have a significant effect on the earth's climate. Rebbeca Lindsay (NASA) suggests that with so much effort being put into the role of AGW, the role of the sun has unfortunately been relegated to being uncontroversial.

While some groups try to play down the role of the sun, others see a much bigger role for the sun. They cite the contemporaneous warming of Mars with the Earth as solid proof of the sun's role.

An important figure in the role of the sun is one Habibullo Abdussamatov, who is the  head of space research at St. Petersburg's Pulkovo Astronomical Observatory in Russia.He suggests the real problem confronting humankind is a global temperature drop. Some astrophysicists point to this phenomenon because of the current quiet period of the sun.