Chemistry 0620 · IGCSE · Air quality and climate

Air quality and climate — practice question

Methane and carbon dioxide are both greenhouse gases. Which row shows one source of methane and one source of carbon dioxide?

  • Asource of methane: decomposition of vegetation; source of carbon dioxide: hydrogen car exhausts
  • Bsource of methane: digestion in animals; source of carbon dioxide: diesel car exhausts
  • Csource of methane: petrol car exhausts; source of carbon dioxide: decomposition of vegetation
  • Dsource of methane: respiration; source of carbon dioxide: petrol car exhausts

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