Which gas is a major contributor to the greenhouse effect and global warming?
AOxygen
BNitrogen
CHelium
DCarbon dioxide
Explanation
Carbon dioxide is a major greenhouse gas that traps heat in Earth’s atmosphere, contributing to global warming as its concentration rises due to activities like burning fossil fuels. Plants absorb carbon dioxide during photosynthesis, which helps regulate atmospheric levels naturally. Other greenhouse gases include methane and water vapor, though carbon dioxide is often highlighted because of human emissions. Explore more Everyday Science MCQs on mcqstutor to keep practicing.

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