Melting permafrost increases greenhouse gas from Arctic lakes

Groundwaters that circulate through the subsoil as a result of melting permafrost can transport carbon dioxide and methane to Arctic lakes and in turn be emitted to the atmosphere. This process of transporting greenhouse ...

Mountain

A mountain is a large landform that stretches above the surrounding land in a limited area usually in the form of a peak. A mountain is generally steeper than a hill. The adjective montane is used to describe mountainous areas and things associated with them. The study of mountains is Orology. The 50 tallest mountains in the world are in Asia.[citation needed]

Exogeology deals with planetary mountains, which in that branch of science are usually called montes (singular - mons). The highest known mountain in the Solar System is Olympus Mons on the planet Mars (elevation 21,171 m).

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