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Nitrous oxide

Nitrous oxide, also known as dinitrogen oxide or dinitrogen monoxide, is a chemical compound with chemical formula N2O.

It is commonly known as laughing gas due to the exhilarating effects of inhaling it.

It is used in surgery and dentistry for its anaesthetic and analgesic effects.

Nitrous oxide is present in the atmosphere where it acts as a powerful greenhouse gas.

Note:   The above text is excerpted from the Wikipedia article "Nitrous oxide", which has been released under the GNU Free Documentation License.
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