1. It's about the dangers of smoking.

2. The writer thinks smoking is a bad habit which we must avoid as it doesn't give us any advantages.

3. Smoking can make you feel relaxed and lose weight. In contrast, smoking can cause lung cancer and bronchiectasis.

4. Smoking is a bad thing as it has many negative effects.

5. Vocabulary

through = used as a function word to indicate passage into and out of a treatment, handling, or process

nevertheless = in spite of that

lung cancer = Cancer is a disease in which cells in the body grow out of control. When cancer starts in the lungs, it is called lung cancer.

accident = an unfortunate incident that happens unexpectedly

merely = nothing more than

disease = a particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not immediately due to any external injury

mentally = with regard to the mind or its capacity

encounter = to come upon or experience especially unexpectedly

pressure = the burden of physical or mental distress