smoking is bad for your health
喫煙は健康に悪いという事実を忘れてはいけません。
We must not forget the fact that smoking is harmful to our health.
喫煙は健康に悪いよ。
Smoking is bad for your health.
喫煙は健康に悪い。
喫煙は健康に悪いと言われています。
Smoking is said to be bad for your health.