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Global warming is a term that describes the increase in Earth's average global temperature over time. Approximately 98% of climate scientists agree that the globe is warming a result of anthropogenic activity.

Check out the latest IPCC report to learn more about our current state of knowledge regarding climate change...

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Global warming is a term that describes the increase in Earth's average global temperature over time. Approximately 98% of climate scientists agree that the globe is warming a result of anthropogenic activity.

Check out the latest IPCC report to learn more about our current state of knowledge regarding climate change and global warming (link below).

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Climate change is the more general term describing alterations in the earth's temperature and climate. Global warming is a term coined in 1979 according to NASA, a scientific group that prefers the term "climate change" to "global warming". One reason NASA holds to this preference relates to the predicted impacts of a changing climate:

But temperature change itself isn't the most severe effect of changing climate. Changes to precipitation patterns and sea level are likely to have much greater human impact than the higher temperatures alone.

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Global warming is the overall increase in temperatures around the globe.  This does not mean that all temperatures will be higher than usual at every moment and in every place.  Instead, it means that the overall average of temperatures across times and places is rising.  The kind of global warming that we particularly worry about is called "anthropogenic."  This is a kind of global warming that is caused by the activities of human beings.  We worry about this more because it is unnatural and because we feel that we ought to do something to stop it before it changes our climate dramatically.

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Global warming is controversial. The term is actually not precisely accurate anymore. Now we call it climate change. It is difficult to accept that extreme blizzards are the result of global warming, so it's easier to use the term climate change. Climate change has been happening on earth since humans were here. The controversy is whether or not it is caused by humans.
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Global warming is literally the temperature here on Earth rising. It is occurring but scientists disagree on why the Earth is warming up. Some scientists say that it is happening because it is a naturally occurring event. Other scientists will argue and say that humans are causing global warming. For example, it is true that ice caps are melting and as this happens the sea levels will rise. There are many things that we can do to help the environment and hopefully decrease the rate of global warming.

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Global warming is part natural climate change process of Earth's evolution, but it is speeding up because of the pollution we have created.  Global warming has increased at a very rapid rate due to carbon emissions that are put into our atmosphere and help to trap in sunrays instead of those sun rays being expelled back onto space.  So when this happens our Earth is basically being cooked, and its causing distratous effects worldwide such as ice caps melting which directly is effecting polar bears right now.  Also small islands, especially in the Pacific are already seeing signs of global warming by many of their crops being destroyed by salt water.  Many of the atoll islands in the Pacific will be under water in just a few decades, and at this rate it could happen in one decade.

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In general, global warming is the idea that the excessive burning of fossil fuels will lead to warmer global temperatures, and will, in turn, have a major impact on the Earth's systems.  Enotes has extensive information on this topic .. please use the following links to further answer the question.

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http://www.enotes.com/global-warming-threat-article/

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