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Here are some tasks awaiting attention:
- Expand : *Expand lead.
- Look at using summary style.
- 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".
- Describe some common sources of agricultural pollution and industrial pollution
- Explain why countries don't follow WHO guidelines e.g. new air pollution levels
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