The warming of the atmosphere is caused by poluution and it leads to melting glaciers and causes the ocean water to warm up. On the tiny island of Tuvalu, rising sea levels are having a terible effect. Many residents have been forced to abandon their homes as water levels have risen. The Maldives is dealing with a similar situation. rising seas are forcing the inhabitants to consider moving. Most of the tiny island are less than two meters above sea level. This could affect cities on coastlines, too.