1) Which of the following is a greenhouse gas that contributes to global warming? a) Oxygen b) Helium c) Nitrogen d) Carbon dioxide 2) What is the primary cause of deforestation? a) Mining activities b) Agricultural expansion c) Industrial pollution d) Urbanization 3) Which renewable energy source harnesses energy from the sun? a) Wind power b) Solar power c) Hydroelectric power d) Geothermal power 4) What is the main source of ocean pollution? a) Agricultural runoff b) Industrial waste c) Plastic pollution d) Oil spills 5) Which environmental issue is associated with the depletion of the ozone layer? a) Acid rain b) Global warming c) Deforestation d) Ozone depletion 6) What is the term for the gradual increase in Earth's average temperature due to human activities? a) Greenhouse effect b) Acidification c) Desertification d) Climate change 7) Which of the following is a renewable resource? a) Coal b) Natural gas c) Solar energy d) Petroleum 8) What is the primary cause of coral reef degradation? a) Overfishing b) Oil spills c) Ocean acidification d) Deforestation 9) Which action contributes most to reducing air pollution in urban areas? a) Planting trees b) Using public transportation c) Recycling plastic d) Using energy-efficient appliances 10) What is the term for the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture? a) Desertification b) Soil depletion c) Erosion d) Land degradation 11) What is the primary source of water pollution from agricultural activities? a) Oil spills b) Pesticides and fertilizers c) Industrial waste d) Plastic pollution 12) Which of the following is a consequence of ocean acidification? a) Increase in coral reef growth b) Decrease in shellfish populations c) Expansion of marine habitats d) Decrease in sea levels 13) What is the main cause of habitat loss for many wildlife species? a) Renewable energy projects b) Urbanization and infrastructure development c) Conservation efforts d) Reduction in hunting activities 14) Which environmental problem is caused by the accumulation of non-biodegradable waste in oceans? a) Acid rain b) Deforestation c) Coral bleaching d) Marine pollution 15) What is the term for the process of turning waste materials into reusable materials? a) Composting b) Landfilling c) Recycling d) Incineration 16) How does overfishing contribute to marine ecosystem degradation? a) By disrupting food chains and depleting fish populations b) By reducing ocean temperatures c) By promoting coral reef growth d) By increasing biodiversity 17) Which of the following is a greenhouse gas released during agricultural activities? a) Methane b) Carbon monoxide c) Nitrous oxide d) Sulfur dioxide 18) What is the term for the process of cutting down trees without replanting them? a) Reforestation b) Conservation c) Afforestation d) Deforestation 19) Which environmental issue is primarily caused by the combustion of fossil fuels? a) Acidification of oceans b) Air pollution c) Desertification d) Ozone layer depletion 20) What is the primary cause of global climate change? a) Shifts in global wind patterns b) Changes in solar cycles c) Human-generated greenhouse gas emissions d) Volcanic activity 21) How does deforestation affect the water cycle in the environment? a) Increases rainfall b) Increases flood intensity c) Reduces evaporation d) Lowers air temperatures

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