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Environmental aspects Pesticides 10 Environmentalists 5 Toxicology 5 Pesticides and wildlife 4 Science writers 4 Biological control 3 more ... Environmental ethics 3 History 3 Insect pests 3 Naturalists 3 Environmentalism 2 Nature 2 Biologists 1 Conservationists 1 DDT (Insecticide) 1 Effect of human beings on 1 Environmental health 1 Environmental law 1 Influence 1 Marine biologists 1 Marine ecology 1 Wildlife conservation 1 less ...

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