Question

What problems can we have from smoke coming out of vehicles

Answer 1

Lung disease:
asthma,
emphysema
chronic obstructive pulmonary disease (COPD).
Heart disease:
coronary artery disease
congestive heart failure.

Answer 2

The black smoke emission has carbon and other carbon compounds such as Carbon monoxide and carbon dioxide these gases especially carbon monoxide is highly dangerous if unhealed.Carbon monoxide could cause several severe health problems.The color black of the smoke is due to the unburned carbon this is also harmful.There are a lot of chemical in black smoke which could be harmful for your health,and hence it can also cause global problems . the social cost will increase and the society will suffer.