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Biological background should precede ‘prehistory’. Anologues of pollution in other species are discussed in the chapter on pollution in Townsend, Begon and Harper’s Essentials of Ecology, for example. For a very early case, consider the formation of oxygen in the ocean and atmosphere, which James Walker (1986) describes as “the most severe pollution episode in the history of the earth”.
Explain why countries don’t follow WHO guidelines e.g. new air pollution levels
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This article was the subject of a Wiki Education Foundation-supported course assignment, between 21 September 2022 and 8 December 2022. Further details are available on the course page. Student editor(s): Sssara7 (article contribs).
On the panel that says, “Part of a series on Pollution” the word “pollution” doesn’t appear unless you highlight it, but this may be just a problem for me. Spiileer (talk) 20:33, 26 September 2025 (UTC)[reply]
