The Scientists say simply that Earth will become too hot for human habitation. Research done by the University of NSW has also forecasted the effect of climate change over the next three centuries to be devastating. It suggests without action to cut greenhouse gas emissions, mankind's activities could prompt average temperatures to rise as much as 10 to 12 per cent by 2300. The research, produced in partnership with the Purdue University in the United States, is published in the US-based scientific journal Proceedings of the National Academy of Sciences on Tuesday. Scientists Suggest Earth Could Be Uninhabitable In 300 Years But hey, that's a long way off. Who cares?