Greenhouse gases

Greenhouse gases are gases that cause the 'greenhouse effect' by letting solar radiation reach the Earth's surface and absorbing infrared energy emitted by the Earth. The concentration of some greenhouse gases in the atmosphere is rising as a result of human activities, leading to an increase of the Earth's average temperature. The most important of these gases comprise: carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O) and fluorinated gases (F-gases), such as hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) (WMO, 2019).

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