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Global warming - 4 dictionary results

global warming

–noun
an increase in the earth's average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect.

Origin:
1975–80
global warming  
n.  An increase in the average temperature of the earth's atmosphere, especially a sustained increase sufficient to cause climatic change.

global warming

The term attached to the notion that the Earth's temperature is increasing due to the greenhouse effect.

Note: Whether global warming is actually happening is a subject of scientific debate.
global warming  
An increase in the average temperature of the Earth's atmosphere, especially a sustained increase great enough to cause changes in the global climate. The Earth has experienced numerous episodes of global warming through its history, and currently appears to be undergoing such warming. The present warming is generally attributed to an increase in the greenhouse effect , brought about by increased levels of greenhouse gases, largely due to the effects of human industry and agriculture. Expected long-term effects of current global warming are rising sea levels, flooding, melting of polar ice caps and glaciers, fluctuations in temperature and precipitation, more frequent and stronger El Niños and La Niñas, drought, heat waves, and forest fires. See more at greenhouse effect.
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