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</html><description>&#x2022; CO(g), H2S(g), SO2(g), SO3(g), NO(g), NO2(g) and CO2(g) are the inorganic compounds which change the atmospheric composition. Organic compounds including hydrocarbons, halo hydrocarbons and particles such as dust and carbon also contribute to change the composition of the atmosphere. &#x2022; Some CO(g) in atmosphere is formed by the oxidation of methane, which is formed [&hellip;]</description><thumbnail_url>http://astan.lk/al_virtualclassroom/wp-content/uploads/2017/01/e-1.png</thumbnail_url></oembed>

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