Answer is C

• • Explanation: Burning fossil fuels releases large quantities of CO2 into the atmosphere, exceeding the natural absorption capacity and disrupting the carbon cycle.

Answer is B

• • Explanation: Disrupted carbon cycle leads to global warming, which in turn causes more extreme weather events like heatwaves, floods, and droughts.

Answer is B

• • Explanation: Supporting sustainable businesses encourages practices that minimize environmental impact.

Answer is C

• • Explanation: CO2 is the most abundant greenhouse gas in the atmosphere and plays a vital role in the carbon cycle.
  • (a) Methane (CH4): While methane is a greenhouse gas, it's present in much smaller quantities compared to CO2 in the atmosphere.
    (b) Carbon monoxide (CO): Carbon monoxide is another gas with environmental concerns, but its concentration in the atmosphere is even lower than methane.
    (c) Carbon dioxide (CO2): This is the correct answer. Carbon dioxide (CO2) is the most abundant greenhouse gas in the atmosphere, making it the primary reservoir of carbon there.
    (d) Nitrogen gas (N2): Nitrogen gas makes up the vast majority of the atmosphere (around 78%), but it doesn't contain any carbon and isn't considered a reservoir of carbon.
    So, CO2 (carbon dioxide) is the most plentiful gas containing carbon in the atmosphere, making it the primary reservoir.

Answer is C

• • Explanation: Encouraging personal vehicles increases reliance on fossil fuels and contributes to the disruption.