Question

The ozone layer is Essential for life on earth Caused by the use of fossil fuels Located in the troposphere Natural filter for UV radiation Both A and D are correct Greenhouse gases Trap air in the troposphere and warm the Earth Are not related to human activities c. Absorb UV radiation coming from the sun Absorb heat released from Earth's surface, which later warms the Earth's surface 1. Sources that are scattered and diffuse and cannot be traced to any single site of discharge are called Point sources Nonpoint sources Natural pollutants Artificial pollutants 11. The estimate of human impact on Earth's ecosystems, measured in terms of the area of Earth's surface required to produce the necessary resources and absorb the wastes generated, is called the 2. Ecological impact b. Human ecological footprint Global footprint 1 Carbon footprint a 12. The tragedy of the commons refers to the overuse of . Governmental regulation Common-property or free-access resources Solar capital d. Synthetic chemicals - The removal of vegetation, especially on hillsides, increases the risk of Desalination Flooding Groundwater withdrawal Saltwater intrusion Which of the following contributed to increasing damages due to floods? Failing dams Destruction of wetlands in floodplains Water diversion Deforestation All the above are correct All the above are correct except B

Answer 1

Question

8. The ozone layer is essential for life on Earth and is a natural filter for UV radiation. Therefore both statement A and D are correct. Hence option e is correct.

9. Green house gases like methane, nitrous oxide trap the heat radiating from Earth and make it warm. Hence option a is correct  

10. Sources that are scattered and diffuse and could not be traced to any other site. Hence option b is correct.

12. The tragedy of common refer to the use of common property or free-access resource.

13. The removal of vegetation, especially on hillsides increases the risk of flooding. Hence option b is correct.