Ch4 ch2ococo2

The yearly loss of methane by this reaction currently amounts to about 507 Tg (where 1 Tg, or teragram, is 1012 g—1 million metric tons), and the net sink from all processes amounts to about 577 Tg per year.

The other two sinks for methane gas are its reaction with soil and its loss to the stratosphere, to which a few percent of emissions eventually rise. Methane reacts there with OH, or atomic chlorine or bromine, or excited atomic oxygen; reaction with the latter produces hydroxyl radicals and eventually water molecules:

Coping with Asthma

Coping with Asthma

If you suffer with asthma, you will no doubt be familiar with the uncomfortable sensations as your bronchial tubes begin to narrow and your muscles around them start to tighten. A sticky mucus known as phlegm begins to produce and increase within your bronchial tubes and you begin to wheeze, cough and struggle to breathe.

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