What percentage of air is made up of nitrogen?

• 78%

• 21%

• 95%

• 5%

What is the main cause of air pollution in South Africa?

• Natural disasters

• Household waste

• Coal-fired power plants

• Agriculture

What is the process called when water moves from the land into the air and back again?

• Water condensation

• Water evaporation

• Water flow

• Water cycle

What is the main source of fresh water on Earth?

• Lakes

• Glaciers

• Rivers

• Oceans

What is one of the main uses of forests?

• To generate electricity

• To create deserts

• To provide food

• To produce oil

What is a major threat to wildlife in South Africa?

• Conservation efforts

• Poaching

• Eco-tourism

• Planting trees

What is soil erosion?

• The increase of soil nutrients

• The creation of new soil

• The removal of soil by water or wind

• The growth of plants

What is the estimated annual soil loss in South Africa?

• 1 billion tonnes

• 500 million tonnes

• 300 to 400 million tonnes

• 100 million tonnes

What is the purpose of conservation areas?

• To build houses

• To protect flora and fauna

• To increase tourism

• To create industrial zones

What is eco-tourism aimed at?

• Promoting urban development

• Attracting tourists to preserved areas

• Building new hotels

• Increasing fishing activities