(Q).
Given the fact that: Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do. Answer the question: Chris is studying two countries. He finds that China has twice as many factories putting out fossil fuels into the air than the United States. Based on this information, the factories in United States or China are causing more air pollution?
(A).
China

(Q).
Given the fact that: In erosion, a slower moving stream will only carry smaller particles. Answer the question: John was watching the movement of a stream in the forest. He noticed that the faster moving stream could carry particles that are Larger or Smaller?
(A).
Larger

(Q).
Given the fact that: As greenhouse gases increase, changes will be more extreme. Answer the question: Reid notices no change in the weather and temperature from 100 years ago. This likely was caused by increased or decreased greenhouse gas levels?
(A).
decreased