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प्रश्न
By what percentage has CH₄ (methane) concentration increased above pre-industrial levels since 1750?
विकल्प
149%
100%
180%
75%
MCQ
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उत्तर
Methane (CH₄) concentration has increased 149% above pre-industrial levels since 1750. This dramatic increase reflects the expansion of agriculture, livestock farming, fossil fuel extraction, and waste decomposition, making methane a potent greenhouse gas with a higher warming potential than CO₂.
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