What is global warming? Global warming is the increase in temperature in the Earth's Atmosphere generlly attributed to green house effects cause by the increase level of carbon dioxide. What effect can it cause? It can make ice melt and the polar bear or artic animal will lost their habbitat or the won't have food to eat because they can't hunt. This causes them to starve to death. What can we do the help? The easiest thing we can do is release the least amount of carbondioxide as possible.