Miami Los Angeles New York London Venice and Tokyo those are just a handful of cities that would be part of what the United Nations secretary general called a quote mass exit as of entire populations on a biblical scale if global warming isn't addressed the secretary general warned the UN security council that sea level rise has dramatic implications for global peace and security and it must be addressed now the UN's intergovernmental panel on climate change found that sea levels rose 6 to 10 inches between 1900 and 2018 at the current rate of temperature increase across the globe they predict another foot point 5 of rise by the year 2100 and that would greatly affect the nearly 1000000000 people who live in coastal zones at low elevations on top of working to halt or reverse climate change the U. N. says we need to prepare to address the legal and human rights issues that will come with the mass displacement of people around the world