I think the answer you are looking for is tobacco
Answer:
Cardiovascular Disease.
Explanation:
Atherosclerosis is also the most common cause of cardiovascular disease.
Atherosclerosis is when a disease in which the inside of an artery narrows due to the build up of plaque.
Answer:
It presents a biological hazard, or biohazard.
Explanation:Hope this helps have an amazing day :D