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