Hydrogen Oxygen Nitrogen Carbon dioxide
Well known Unpredictable Insignificant Localised
Carbon dioxide and water vapour Nitrogen and oxygen Sulphur and sodium Salt and acid
Carbon dioxide Nitrogen Oxygen Sulphur dioxide
Add dilute hydrochloric acid Add powdered limestone Add dilute nitric acid Evaporate some of the water
During high temperature combustion During neutralisation Constantly by sunlight Very rarely under the ground
A coal burning power station A natural gas burning power station An oil fired power station A hydroelectric power station