![]() Scientists worry that the climate is changing faster than some living things can adapt to it. Natural cycles of warming and cooling are not enough to explain the amount of warming we have experienced in such a short time-only human activities can account for it. However, the recent warming trend is happening much faster than it ever has. Past changes in Earth’s temperature happened very slowly, over hundreds of thousands of years. It has also gone through warm periods when temperatures were higher than they are today. Our planet has gone through multiple ice ages, in which ice sheets and glaciers covered large portions of the Earth. Global warming is often described as the most recent example of climate change.Įarth’s climate has changed many times. ![]() Global warming describes the current rise in the average temperature of Earth’s air and oceans.
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