Computer models forecast

Computer models forecast another one to four degrees Celsius of warming by 2100,depending on how much additional fossil fuel we burn.What does that mean for the ice currently on Greenland and Antarctica?Past climate changes suggest that even a small warming shift can begin a process of ice melt that continues for thousands of years.By the end of this century,ice melt is expected to raise the sea level by 30 to 100 centimeters,enough to impact many coastal cities and island nations.