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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
Priority 1 (top)
{{User:ClueBot III/ArchiveThis|archiveprefix=Talk:Pollution/Archives/|format=Y|age=26297|index=yes|archivebox=yWebster online dictionary as the source. However, the dictionary does not define the word that way, even slightly. Such a fundamental statement should be cited correctly. While I am not sure what source is best to use in this case, other definitions available online include "introduction of harmful substances or products into (talk) sept 17th 2056
There are two definitions given in the body, sourced to the EPA and the UN (I added them a few months ago because there were none). They can be incorporated into the lead. Trainsandotherthings (talk) 21:45, 27 September 2022 (UTC)[reply]
Wiki Education assignment: Research Process and Methodology - FA22 - Sect 201 - Thu
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).
level-3 vital article is rated B-class on Wikipedia's content assessment scale.
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).