Quiz · Tipping Points in the Climate System

Question 1What is the speaker mainly talking about in this recording?

How scientists measure the thickness of polar ice sheets Why coral reefs attract millions of tourists each year New technology that removes carbon from the atmosphere Climate tipping points and why cutting emissions still matters

Question 2Which gas escapes when the frozen northern ground warms?

Carbon monoxide Methane Ozone Sulphur dioxide

Question 3Why is methane release from permafrost called a self-reinforcing loop?

The released gas speeds warming, which thaws even more permafrost The gas traps moisture that later falls back as heavy rain The melting ice reflects more sunlight back into space The extra carbon helps new forests grow in the tundra