Explain how the Sun’s harmful rays are naturally filtered by the Earth. What are the factors affecting its efficiency and what ill effects do they have on the Earth’s surface? What measures should be...

Explain how the Sun’s harmful rays are naturally filtered by the Earth. What are the factors affecting its efficiency and what ill effects do they have on the Earth’s surface? What measures should be taken to prevent the pollution they cause?

Describe the role of atmospheric winds in ozone losses over the poles. Name three significant events in the history of ozone depletion.