Environmental science guys answer​

13 c 15 a. I solve the two problem

13.Apart from PM 2.5 and PM 10 which are known to be the most harmful air pollutants, there is sulphur dioxide, nitrous oxide, carbon monoxide and other chemical gases which can equally cause irritation in the eyes . "It is called chemical conjunctivitis.

using the scientific method.

dont understand question can you makeit more better