It Could Sink Cities Sea levels have risen about seven inches in the last 100 years, which is more than in the previous 2,000 years combined, and they could rise another 19 inches by 2050. Advertisement Tweet Pin It Related Posts It Makes People More Aggressive 37% of Americans Still Believe Global Warming Is a Hoax The United States Is Responsible for 80% of the World’s Fossil Fuel Consumption Each Year