claim: Climate scientist James Hansen : we have until perhaps 50 years from now, or maybe a little longer and at that point, we are looking at 10, 20, 30 feet of sea-level rise.
evidence: For example, in 2007 the Intergovernmental Panel on Climate Change ( IPCC ) projected a high end estimate of 60 cm ( 2 ft ) through 2099, but their 2014 report raised the high-end estimate to about 90 cm ( 3 ft ).