Carbon sinks are places on earth that store carbon and include all of the following, EXCEPT:
A) carbonate rocks.
B) a herd of zebras.
C) wood from trees.
D) a cement factory.
The most common energy source for electricity generation is:
A) coal.
B) oil.
C) natural gas.
D) None of the above; fossil fuels are not consumed in electricity generation.
In the story, “Penguins Helped and Hurt by Changing Climate,” penguin colonies provide evidence that:
A) the number of penguins is shrinking in Antarctica but growing in the Arctic.
B) polar bears and other predators are near extinction in some parts of the world.
C) the number of fish in the Southern Ocean is increasing dramatically.
D) climate change is unpredictable and its effects vary from place to place.