Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: Ayyuka a cikin sararin samaniya suna ba da gudummawa har zuwa 90% na jimlar formaldehyde a cikin muhalli. Formaldehyde matsakaici ne a cikin iskar gas (ko konewa) na methane, da sauran mahaɗan carbon, misali a cikin gobarar daji, sharar mota, da hayakin taba. Lokacin da aka samar a cikin yanayi ta hanyar aikin hasken rana da oxygen akan methane na yanayi da sauran hydrocarbons, ya zama wani ɓangare na smog. An kuma gano formaldehyde a sararin samaniya (duba ƙasa).  Tambaya: Menene ma'anar ƙonewa?
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