This is a long article with a lot of facts. I always just point to the simple fact that man didn’t cause Mars to warm up, so that tells us we are just in a solar cycle.
Check it out:

Dubbed the “high priest of climate skepticism,” former Margaret Thatcher adviser Christopher Monckton has become a formidable foe of the movement claiming mankind is causing catastrophic “global warming,” noting that the average worldwide temperature has not risen in nearly two decades.

So when President Obama recently announced his plan to bypass Congress and use his executive power to “fight climate change,” targeting the coal-energy industry, Monckton responded.

Some of what Obama said was simply copied from Al Gore’s writings on global warming, he said, and virtually everything was incomplete, misleading – or wrong.

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