What harms the respiratory and circulatory systems?
Greenhouse gasses burning coal inoculation incinerated mercury fossil fuels water vapor Sulfur dioxide air
A B C D E F G H
Incinerated mercury pollutes the air.
Incinerated mercury harms the respiratory and circulatory systems.
What harms the respiratory and circulatory systems? (A) Greenhouse gasses (B) burning coal (C) inoculation (D) incinerated mercury (E) fossil fuels (F) water vapor (G) Sulfur dioxide (H) air