What harms the respiratory and circulatory systems?
Options:
- (A) Greenhouse gasses
- (B) burning coal
- (C) inoculation
- (D) incinerated mercury
- (E) fossil fuels
- (F) water vapor
- (G) Sulfur dioxide
- (H) air Let's be accurate as possible.
Air pollution harms the respiratory and circulatory systems. Incinerated mercury pollutes the air. Incinerated mercury harms the respiratory and circulatory systems.
The final answer: (D).