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When you say produced, do you mean chemically made from another substance, or you do mean released into the atmosphere, or do you mean captured and stored? Methane, or CH4, is a biogas as it is gas biologically created by organisms. Methane is created in natural processes from which it may be immediately released into the atmosphere or on much slower time ...


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I think the third paragraph of the article hints at what might be the thinking. In the next five years, the total area covered by artificial rain or snowfall will reach 5.5 million sq km, while over 580,000 sq km (224,000 sq miles) will be covered by hail suppression technologies. The statement added that the program will help with disaster relief, ...


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As Jean-Marie Prival commented, methane is the biogas (after removing impurites such as $H_2S$ and $CO_2$). Biogas is renewable because "From a carbon perspective, as much carbon dioxide is absorbed from the atmosphere in the growth of the primary bio-resource as is released, when the material is ultimately converted to energy."


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