Fact 1: Pollutants have a negative impact on the environment. Fact 2: Second, the environment is important to health. Given the two facts above, pollutants can harm ?

Choices:
(1). air;
(2). lungs;
(3). people;
(4). health;
(5). humans;
(6). the skin;
(7). animals;
(8). cells;
The answer is:
(4).