A. 50 million tons
B. 150 million tons
C. 250 million tons
Answer: C -- 250 million tons, says the EPA. That's more than 1,000 times greater than one of the largest cruise ships in the world.
10. Which of the following countries had higher emissions of the greenhouse gas carbon dioxide, per capita, in 2008 than the other two?
A. United States
C -- Australia emitted 26.08 tons of carbon dioxide per person in 2008. For comparison's sake, a full tanker truck can weigh between 12 and 25 tons. U.S. and Russian per-person emissions that year were 22 and 15 tons, respectively.