Q.Which of the following would most likely help to slow down the greenhouse effect.
Step 1. Evaluate each option against what actually adds to or removes greenhouse gases. Converting tropical forest to grazing land (a) destroys a carbon sink and adds cattle-linked methane — it worsens the greenhouse effect, not slows it.
Step 2. Burying excess paper packaging 'to ashes' (b) implies incineration, which releases stored carbon as CO2 rather than sequestering it, so it also adds to greenhouse gas load.
Step 3. Landfills are a major uncontrolled source of methane (CH4), a greenhouse gas roughly 20 times more effective than CO2 at trapping heat. Redesigning landfill dumps so this methane is collected (c) — rather than escaping to the atmosphere — directly removes a potent greenhouse gas from circulation, and the collected gas can even be burned for electricity instead of vented raw.
Step 4. Promoting private over public transport (d) increases per-passenger fuel combustion and CO2 emissions, worsening rather than easing the greenhouse effect.
Only option (c) — capturing landfill methane — actively removes a greenhouse gas rather than adding one, making it the correct choice.
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