Air pollution 0.0 / 5 ? BiologyHuman impact on the environmentGCSEEdexcel Created by: AnnaCreated on: 14-04-13 14:47 What is the most common cause of air pollution? Fossil fuels from vehicle engines and power stations 1 of 7 What gases contribute most to air pollution? Carbon Monoxide (CO), Carbon dioxide (CO2), sulfur dioxide (S02) 2 of 7 What gas is the main cause of acid rain? Sulfur dioxide (SO2) 3 of 7 What is commonly used to indicate air pollution? Lichens 4 of 7 What does a bushy lichen indicate? Clear air 5 of 7 What does a leafy lichen indicate? Fairly clear air 6 of 7 What does a crusty lichen indicate? Polluted air 7 of 7
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