Answer the following questions.

Jane: Hi, Ray! What are you doing?

Ray: Hi, Jane! I am reading an article on smoking.

Jane: Smoking! Why?

Ray: For presentation in my Science class.

Jane: So what did you learn about smoking?

Ray: Did you know that smoking is one of the main causes of sickness in smokers? For example, smoking weakens the lungs due to which there is a build-up of poisonous substances. Smoking causes heart attacks, stroke, ulcers.

Jane: Really? It sounds scary.

Ray: It is! If we do not educate people about the effects of smoking, there will be a lot of people suffering from these diseases.

Jane: You are right. We have to do it.

What are Jane and Ray talking about?