evidence: But that increase is projected to be 0.33 feet (0.1 meters) lower at 1.5 degrees Celsius warming than at 2 degrees. If warming reaches 2 degrees Celsius, more than 70 percent of Earth’s coastlines will see sea-level rise greater than 0.66 feet (0.2 meters), resulting in increased coastal flooding, beach erosion, salinization of water supplies and other impacts on humans and ecological systems. About 10.4 million fewer people would be exposed to these risks by 2100 at the 1.5-degree Celsius threshold, assuming humans don’t adapt. Risks are projected to be highest in South and Southeast Asia, but sea level rise will significantly impact areas all around the world to varying degrees. [...] Polar Ice Sheets — The report states, with medium confidence, that at an increased level of warming between 1.5 and 2 degrees Celsius, instabilities in the Antarctic ice sheet and/or the irreversible loss of the Greenland ice sheet could lead to multi-meter (greater than 6 feet) sea level rise over a time scale of hundreds to thousands of years.