Lesson 1Transfers of biomass between trophic levels
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- Lesson 2
Negative human interactions with ecosystems and impacts on biodiversity
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Examples of human interactions with ecosystems, including use of peat
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Benefits and challenges of maintaining biodiversity
1 2 1 - Lesson 5
Impacts of environmental changes on the distribution of organisms
1 2 1 - Lesson 6
Factors affecting human food security, and possible solutions
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