Multiple choice

What percent of wastewater generated by society flows, untreated, back into the environment?

  1. about 99%

  2. about 80%

  3. about 65%

  4. about 40%

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to UN reports, approximately 80% of all wastewater produced by human activities is discharged back into the environment without being treated.