oxygen
Biology, 01.04.2020 18:33, didraga777
Which gas in Earth’s atmosphere has increased over time due to burning fossil fuels?
oxygen
nitrogen
water vapor
carbon dioxide
Answers: 3
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Blood has traveled from the heart to the toes. which describes the next step of the circulation process?
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Which gas in Earth’s atmosphere has increased over time due to burning fossil fuels?
oxygen
oxygen
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