Is Earth Hour, the annual ritual in which people the world over turn out their lights as a show of solidarity in the fight against climate change and other environmental issues, a waste of time and energy? Bjorn Lomborg certainly thinks so -- but what is accomplished by niggling over the metrics of a global awareness campaign?

Bjorn Lomborg has been called a global warming denier, a traitor, an idiot, and a parasite. Today, he's on a rampage trying to convince us how to invest in alternative energies.

Watch Bjorn Lomborg on how Al Gore "oversold the message" on climate change and how we should be spending more on alternative energy research: Why ...

Notoriously publicity shy Bjørn Lomborg, the Danish climate skeptic known for saying outrageous things about climate change, has seemingly changed hi...

The world's most high-profile climate change sceptic is to declare that global warming is "undoubtedly one of the chief concerns facing the world toda...

Lomborg has revealed himself to be a non-denier... denier. He either doesn't understand the science of climate change or he's purposefully misrepresenting it, using smoke and mirrors and shell games. In a word, spin.

TWITTER: @GreenNewsReport. The 'GNR' is also now available on your cell phone via Stitcher Radio's mobile app! IN TODAY'S RADIO REPORT: We're back...

It appears Bjorn Lomborg has come to his senses. The long-time global warming contrarian now acknowledges that climate change is "a challenge humanity must confront."

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Who said that tackling climate change is separate from helping the poorest among us? The issues are all integrally related and the poorest are being hit hardest by climate changes already.

If global warming continues unchecked through the end of the century there will be 400,000 more heat-related deaths annually; there will also be 1.8 million fewer cold-related deaths, for a net gain of 1.4 million lives.

Bjorn Lomborg's most famous argument is that we shouldn't prioritize climate change over other pressing social priorities like poverty alleviation -- as if they're all separate.

How many people in the US realize that the UN panel on climate change said there is 90% chance that the climate change we are seeing at the moment is caused by human activity?