Choose glossary language



Synonyms: CH4

reegle definition:

Methane is one of the six greenhouse gases to be mitigated under the Kyoto Protocol and is the major component of natural gas and associated with all hydrocarbon fuels, animal husbandry and agriculture. Coal-bed methane is the gas found in coal seams. (IPCC)

Wikipedia definition:

Methane is a chemical compound with the chemical formula CH4. It is the simplest alkane, the main component of natural gas, and probably the most abundant organic compound on earth. The relative abundance of methane makes it an attractive fuel. However, because it is a gas at normal conditions, methane is difficult to transport from its source. Methane is a relatively potent greenhouse gas. The concentration of methane in the Earth's atmosphere in 1998, expressed as a mole fraction, was 1745 nmol/mol (parts per billion, ppb), up from 700 nmol/mol in 1750. By 2008, however, global methane levels, which had stayed mostly flat since 1998, had risen to 1800 nmol/mol.

Source: dbpedia

glossary info

How to Search Terms

Please enter a search term or choose a letter to navigate the glossary and to find definitions. This glossary aims to facilitate collaboration on the development of ambitious energy efficiency measures by clarifying definitions and highlighting common terminology. Definitions have been collected from trusted sources. It intended to expand this glossary in the future to include a wiki ensuring a truly collaborative process. If you contribute to this glossary please contact use at:

Understanding Relations

The relation browser enables the user to see the relations between terms.

Below is an explanation of the letters that appear on the arrows in the relation browser

C = Has Concept Scheme. Points to a concept scheme in the reegle glossary. Concept schemes provide the main categories of the reegleglossary.
T = Has Top Concept. Points to a top concept in the reegleglossary. Top Concepts are the top level concepts in a concept scheme.
N = Has Narrower. Points to a narrower concept of the selected concept