METHENE
Like methane is a whose molecules absorb heat trying
to escape to space. Methane contributes to the Earth's
natural. Man- of methane are helping to the
greenhouse effect. Since the beginning of the,
atmospheric methane has more than doubled, and has
contributed 20% to the enhancement of the
greenhouse effect, second only to carbon dioxide.
Methane (CH4) is a colourless, odourless non-toxic
gas consisting of molecules of four hydrogen atoms
and one carbon atom. Methane is combustible, and
mixtures of about 5 to 15% in air are explosive. It is
the main constituent of natural gas, a. It is released
into the atmosphere when organic matter decomposes
in environments lacking sufficient oxygen.
Natural sources include wetlands, swamps and
marshes, termites, and oceans. Man-made sources
include the mining and burning of, digestive processes
in ruminant animals such as cattle, rice paddies and
the burying of waste in landfills. Most methane is
broken down in the atmosphere by reacting with
hydroxyl (OH) radicals.
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