Biology
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Biology
https://www.tes.com/magazine/archive/biology-7
Lead is just one of the heavy metals that affect animals and plants.
Research the effects of others, such as mercury (at Minimata and Nigata in 1950s Japan), copper and zinc (in drainage water and spoil heaps of mines) and cadmium (linked to smelters) as part of a pollution topic.
Investigate the efficiency of different pest-control measures on populations of common pests like greenfly. Try soap solution, Bordeaux mixture and salt solution as well as chemical sprays. Study the labels on pesticide sprays available from garden centres and compare them with the chemicals named in the article.
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