When the planet warmed at the end of past ice ages, retreating glaciers left behind empty landscapes.

The economy will recover and the planet isn't warming.

If it's snowing in Britain, a thousand websites and quite a few newspapers tell us, the planet can't be warming.

He and other doubters say the planet is clearly warming today, as it has repeatedly done, but insist that no one knows exactly why.

But we do not know how quickly the planet will warm or how that warming will affect different regions of the globe.

Sea level rise is an indicator that our planet is warming.

Colonization was feasible, and procedures were initiated as the planet warmed.

Virtually every major scientific body in the world has concluded that the planet is warming, and that greenhouse-gas emissions are the main cause.

Mitt Romney is no longer sure that the planet is warming at all.

It states the record isn't reliable enough to say the planet is warming.