Ozone Hole Over Antarctic Reaches Record Size, Threatens Global Health

The video discusses the current state of the ozone layer, highlighting that the hole over the Antarctic has reached a size comparable to the 2000 record. It explains the role of colder temperatures in this expansion and notes similar, though less severe, thinning over the Arctic. The video recounts the 1985 alarm that led to global efforts to reduce CFCs, which harm the ozone layer. Recent data from 2003 shows the hole has grown, exposing regions to increased UV radiation, which poses health risks. Despite a significant drop in CFC usage, concerns remain about the annual thinning of the ozone layer.

What was the primary cause of the increased size of the ozone hole over the Antarctic in 2000?

• Warmer than average temperatures

• Colder than average temperatures

• Increased industrial activity

• Natural volcanic eruptions

Which year did scientists first raise concerns about the ozone layer depletion?

• 1975

• 1990

• 1985

• 2000

What was the size of the ozone hole in September 2003?

• 20 million square kilometers

• 25 million square kilometers

• 28 million square kilometers

• 30 million square kilometers

Which regions are most affected by the increased ultraviolet radiation due to the ozone hole?

• Central America and the Caribbean

• Asia and the Middle East

• South America, Australia, and southern Africa

• North America and Europe

By how much did the consumption of CFCs decrease from 1986 to 2001?

• From 1 million tonnes to 200,000 tonnes

• From 1.1 million tonnes to 500,000 tonnes

• From 1.1 million tonnes to 110,000 tonnes

• From 2 million tonnes to 1 million tonnes