The investigators say they found no evidence that the university's scientists cheated to prove the existence of human-caused climate change.

VOA: special.2010.04.27

Scientists say climate change and human activity have increasingly led to the melting of massive pieces of Antarctic ice.

VOA: special.2009.04.22

Are climate changes real? If so,were human activities mainly to blame?

VOA: special.2010.01.19

In 1988, Dr Hansen testified before the US Congress, arguing that human induced climate change had begun.

BBC: Nasa's James Hansen retires to pursue climate fight

Similarly, one camp maintains that temperatures are rising dramatically with unspeakable portents, while the other thinks what has happened is entirely a result of undefined internal oscillations in the earth-sun climate system, and that there is virtually no human component to climate change.

FORBES: Global Warming: Hotheads, Flatliners and Lukewarmers, Part One

No climate agreement will succeed without support from those countries that have so far contributed little to human-induced climate change, have low per-capita emissions, and stand to face the biggest challenges in adapting to the coming changes.

UNESCO: Climate change