See how your knowledge stacks up against these stats from the Portable Sanitation Association International, United Nations and World Health Organization. The answer key appears at the end of this nine-question quiz, below the photo of portable restrooms in a field. Enjoy.
1. Question: How many portable restrooms are there estimated to be globally?
A. 2 million
B. 3.4 million
C. 3.7 million
D. 7.7 billion
2. What percentage of people worldwide are estimated to live without an in-home toilet or portable sanitation access?
A. 40%
B. 76%
C. 32%
D. 60%
