Melting of the polar ice caps will add a great amount of fresh water to the oceans, affecting the Great Conveyor belt, which effects the temperature and climate of Europe and the eastern coast of the United States, causing a small ice age.
Because of melting ice in the arctic, many animals such as the polar bears are drowning because they have to swim farther into the ocean to find seals.
Tropical diseases will spread with increased temperatures.
Certain plants and animals will become extinct.
Melting in the Arctic is just one effect of global warming .