Environmental Toxicology — DU B.Sc. (Hons.) Environmental Science Previous Year Question Papers

(b) Explain why environmental toxicology is important for public health and ecosystem protection. (5) 2. Differentiate between the following : (5×3=15) (a) Brownfields and Superfund sites (b) Pesticides and pharmaceuticals as environmental contaminants (c) Risk assessment and risk management 3. Write short notes on the following: (3¾×4=15) (a) Health effects of air pollution (b) Sources of water pollution (c) Emerging issues in air toxicology (d) Emerging issues in water toxicology 4. (a) Explain the classification, history of use and environmental distribution of pesticides. (8) (b) Discuss the fate, transport, health effects and ecotoxicology of pesticides in the environment. (a) Explain the properties and environmental behaviour of nanoparticlcs. (8) (b) Discuss the fate, transport, health effects and ecotoxicological risks of nanoparticlcs. (7) 6. Discuss emerging issues in environmental toxicology with reference to endocrine disruption, microplastics, PFAS, climate change, ethics, global perspectives and future research directions. (15) (b) Explain why environmental toxicology is important for public health and ecosystem protection. (5) 2. Differentiate between the following : (5×3=15) (a) Brownfields and Superfund sites (b) Pesticides and pharmaceuticals as environmental contaminants (c) Risk assessment and risk management 3. Write short notes on the following: (3¾×4=15) (a) Health effects of air pollution (b) Sources of water pollution (c) Emerging issues in air toxicology (d) Emerging issues in water toxicology 4. (a) Explain the classification, history of use and environmental distribution of pesticides. (8) (b) Discuss the fate, transport, health effects and ecotoxicology of pesticides in the environment. (a) Explain the properties and environmental behaviour of nanoparticlcs. (8) (b) Discuss the fate, transport, health effects and ecotoxicological risks of nanoparticlcs. (7) 6. Discuss emerging issues in environmental toxicology with reference to endocrine disruption, microplastics, PFAS, climate change, ethics, global perspectives and future research directions. (15)