(a)[1]
Describe one harmful effect of increased methane levels in air.
(b)[2]
Burning fossil fuels that contain sulfur produces sulfur dioxide. Describe two ways to cut sulfur dioxide emissions from the combustion of fossil fuels.
(c(i))[2]
Nitrogen monoxide, NO, is associated with acid rain. This pollutant occurs in the gases produced by car engines. Describe how nitrogen monoxide is removed from these gases. Include a word equation in your answer.
(c(ii))[2]
State two other harmful effects of oxides of nitrogen in the air.