Methane Emissions
CH₄ emissions from agriculture, energy production, and waste, a greenhouse gas 28-30× more potent than CO₂ over 100 years.
Formula
GWP(CH₄) = 28–30 × CO₂ over 100 years
Real World
BP's Deepwater Horizon blowout (2010) released an estimated 2,900 tonnes of methane directly into the atmosphere, illustrating how fossil-fuel infrastructure is a significant CH₄ source.
Exam Focus
Distinguish between biogenic (livestock, wetlands) and thermogenic (fossil fuels) methane sources when 'classify' or 'categorise' command words appear.
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