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    Question

    What is mainly responsible for the increase in the greenhouse effect?

    A Increasing SO₂ levels Correct Answer Incorrect Answer
    B Ozone layer hole Correct Answer Incorrect Answer
    C Chlorofluorocarbon content is rising Correct Answer Incorrect Answer
    D Increasing CO₂ concentration Correct Answer Incorrect Answer

    Solution

    To convert this to more standard units, let's express it in terms of km/min²: Gaseous oxygen, normally configured as O2, is soluable in water. So is Carbon Dioxide, CO2. Underwater plants take in dissolved CO2 from the water and release O2 into the water. Fish take in dissolved O2 through their gills and release CO2 through their gills.

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