The global climate has gone up only by 0.6 degrees Celsius (1 degree Fahrenheit) in the last 130 years and it has affected us greatly. Scientist say that if the global climate change rises to 2.5 degrees Celsius (36.5 degrees Fahrenheit) then we are going to see the major effects of the ice melting at the polar caps. In 1998, 46 million people lived in areas that were in risk of flooding. Scientist say that if the sea level rises by only 50 centimeters the number of people in risk of floods would rise from 46 million to 92 million people. Coastal wetland ecosystems would also be effect greatly since they are generally a few feet from sea level. Important parts to animal ecosystems such as salt marshes and mangroves would be particularly vulnerable to rising sea level. These areas provide habitat for many species, play a key role in nutrient uptake, serve as the basis for many communities’ economic livelihoods, provide recreational opportunities, and protect local areas from flooding. If the sea level were to rise all those roles that wetlands provide wold be gone. The rise in sea levels would also have an affect on weather. This could cause storms to be a lot more destructive then they have ever been. There would be more flooding, bigger and stronger hurricanes, and more northeastern storms.
http://www.epa.gov/climatechange/effects/coastal/index.html