Air

1.1	The relative proportions of nitrogen, oxygen and carbon dioxide in the atmosphere
1.2	The atmosphere as a source of oxygen, carbon dioxide and nitrogen for living organisms
1.3	Protection from ultra violet radiation provided by the ozone layer
1.4	The importance of carbon dioxide and other gases in controlling the Earth's temperature through the Greenhouse Effect
1.5	Water vapour as an important part of the water cycle

Water

1.6	The main stages and processes involved in the water cycle
1.7	The various uses of water
1.8	Multiple use water management schemes
1.9	Variations in water availability
1.10	Water supply from rivers and aquifers
1.11	Surface storage reservoirs and their effects on the environment
1.12	The process of drinking water treatment
1.13	Water conservation measures

Energy

1.14

The concept of renewable and non-renewable energy resources

1.16

Sustainable development

1.17

The fossil fuels, their formation, extraction, transportation and use

1.18

Nuclear power

1.19

Nuclear fusion

1.20

Nuclear fission

1.21

Renewable energy resources and how the energy is harnessed

1.22

Energy conservation by avoiding unnecessary use of energy and energy efficiency

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