Scientists agreed that the Earth is "firmly on course for the worst-case scenario in terms of climate change, with average global temperatures rising by up to 6C by the end of the century." 80 years isn't long at all. This article explains the major causes and the prediction of what's to come if we we don't make some serious changes asap...
http://www.independent.co.uk/environment/climate-change/world-on-course-for-catastrophic-6deg-rise-reveal-scientists-1822396.html