Environmental Threats to the Planet Quiz

What is soil erosion?

• The accumulation of soil

• The removal of the top layer of soil due to water, wind, tillage, and mass movement

• The formation of new soil

• The planting of crops

Which human activities leave soil most vulnerable to erosion?

• Overgrazing with livestock, mechanisation of agriculture, and deforestation

• Planting trees and crops

• Building houses and roads

• Fishing and hunting

What is desertification?

• The process of soil formation

• Land becoming increasingly dry and arid, turning into desert

• The planting of crops in dry areas

• The accumulation of water in soil

Which factors most accelerate desertification?

• Increased temperatures and extended droughts due to enhanced global warming

• Planting trees and crops

• Building houses and roads

• Fishing and hunting

What causes enhanced global warming?

• Decreased greenhouse gases

• Increased greenhouse gases such as carbon dioxide and methane

• Planting trees and crops

• Building houses and roads

What is the greenhouse effect?

• The cooling of the Earth's atmosphere

• The trapping of reflected longwave radiation by greenhouse gases, causing the temperature to increase

• The planting of crops in greenhouses

• The accumulation of water in soil

Which human activities lead to more greenhouse gases in the atmosphere?

• Burning fossil fuels for energy, transport, agriculture, and deforestation

• Planting trees and crops

• Building houses and roads

• Fishing and hunting

What percentage of greenhouse gas emissions come from sectors other than Energy, according to Figure 5?

• 36,8%

• 25,8%

• 30%

• 26,8%

What is the relationship between GDP per capita and CO2 emissions per person, according to Interactive 2?

• No relationship

• Higher income levels are associated with higher CO2 emissions

• Lower income levels are associated with higher CO2 emissions

• Higher income levels are associated with lower CO2 emissions

What are the sources of air pollution mentioned in the text?

• Industry, fumes from cars, fires from deforestation, and certain climatic conditions

• Planting trees and crops

• Building houses and roads

• Fishing and hunting