1) What do you call the rain that contains chemical waste and causes damage to plants and animals? a) Smog b) Acid rain c) Monsoon rain d) Seasonal rain 2) What is the term used to describe a substance that can be broken down and eaten up by microorganisms like bacteria? a) Compound b) Environmentally friendly c) Biodegradable d) Recycled 3) We all know that the Kaziranga sanctuary is a place where rhinos can live safely away from hunters. What is the term used for such careful use and protection of nature? a) Biofriendly b) Ecofriendly c) Degradation d) Conservation 4) What is the natural environment of a living organism called? a) Habitat b) Surroundings   c) Environment d) Biosphere 5) What is the process of collecting, processing and reusing waste materials called? a) Recycling b) Reworking   c) Reusing d) Reprocessing 6) Name the phenomenon because of which the Earth’s atmospheric temperature is increasing causing widespread environmental changes? a) Atmospheric effect b) Greenhouse effect c) Geothermal effect d) Biothermal effect

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