1 Acid rain is mainly caused by the reaction of rainwater with which two pollutants? A Carbon monoxide and carbon dioxide B Sulphur dioxide and nitrogen oxides C CFCs and water vapour D Argon and oxygen
2 Which gas is produced by the anaerobic decay of organic matter in wetlands? A Carbon dioxide B Methane C Oxygen D Nitrogen
3 Which gas is present in the largest amount in the Earth's atmosphere? A Oxygen B Nitrogen C Carbon dioxide D Argon
4 Which international agreement aims to reduce greenhouse gas emissions? A Kyoto Protocol B Montreal Protocol C Basel Convention D Stockholm Convention
5 Which gas is present in the largest amount in the atmosphere? A Oxygen B Nitrogen C Carbon dioxide D Argon
7 What is the main cause of acid rain? A Excess carbon dioxide B Sulphur dioxide and nitrogen oxides C Chlorofluorocarbons D Particulate matter
8 Which air pollutant is mainly produced by the incomplete combustion of fossil fuels? A Carbon dioxide B Sulphur dioxide C Carbon monoxide D Nitrogen
9 Which human activity is a major source of carbon dioxide in the atmosphere? A Burning of fossil fuels B Growing of trees C Boiling of water D Melting of ice
10 Which layer of the atmosphere contains the ozone layer? A Troposphere B Stratosphere C Mesosphere D Thermosphere
11 The natural greenhouse effect is important because it: A Makes Earth too hot B Keeps Earth warm enough for life C Causes acid rain D Depletes the ozone layer
12 Which air pollutant is mainly produced by incomplete combustion of fossil fuels? A Carbon dioxide B Carbon monoxide C Sulphur dioxide D Ozone
13 Which gas makes up the largest portion of Earth's atmosphere? A Oxygen B Nitrogen C Carbon dioxide D Argon
14 Which gas is produced by the incomplete combustion of fossil fuels and is poisonous? A Carbon dioxide B Carbon monoxide C Sulphur dioxide D Nitrogen
15 Which of the following is an effect of global warming? A Rising sea levels B Decrease in Earth's temperature C More oxygen in atmosphere D Less carbon dioxide
16 Which strategy helps to reduce environmental issues by absorbing carbon dioxide? A Using catalytic converters B Afforestation C Waste management D International agreements
17 Which of the following is a way to reduce environmental problems caused by vehicles? A Increasing coal burning B Using catalytic converters C Adding more CFCs to the air D Cutting down forests
18 Which of the following is a strategy to reduce environmental issues? A Deforestation B Using more fossil fuels C Afforestation D Increasing industrial emissions
19 Which gases are the main sources of acid rain? A Oxygen and nitrogen B Sulphur dioxide and nitrogen oxides C Argon and carbon dioxide D Water vapour and oxygen
20 Which layer of the atmosphere is closest to the Earth's surface? A Stratosphere B Mesosphere C Troposphere D Thermosphere
21 Which gas is responsible for the brown haze in polluted cities? A Nitrogen dioxide B Carbon dioxide C Sulphur dioxide D Oxygen
22 Chlorofluorocarbons (CFCs) cause damage to which part of the atmosphere? A Ozone layer B Water vapour layer C Troposphere only D Particulate layer
23 Which gas is mainly responsible for the greenhouse effect on Earth? A Carbon dioxide B Oxygen C Nitrogen D Argon
24 Which gas is a product of complete combustion of fossil fuels? A Carbon monoxide B Carbon dioxide C Sulphur dioxide D Nitrogen oxide
25 Which method helps reduce air pollution from vehicles? A Burning more coal B Using catalytic converters C Cutting down trees D Increasing factory smoke