Question 1
As growth progresses and countries become richer, pollution
◦ tends to fall.
◦ rises exponentially.
◦ rarely changes.
◦ levels double.
Question 2
An explanation for the "inverted U" is that increased industrialization and growth initially ________ the environment, and in the long run, environmental quality ________.
◦ degrades; continues to get worse
◦ improves; improves even more
◦ improves; gets worse
◦ degrades; improves