The disadvantage of it is to release toxins. Many kinds of exhaust gases out of the air causing acid rain, dust, smoke, vehicle allergic diseases such as cancer, for example.
But it is a disadvantage of releasing toxins. Several types of gas come out through exhaust air to the cause. Dust, smoke, vehicle. Acid rain Diseases such as allergies, cancer, etc.
but it is a disadvantage of toxic gas emissions greenhouse gas emissions come out of many kinds of exhaust into the air cleaner smoke causes acid rain from diseases such as allergies, cancer, etc.