Smoking is harmful to health. ✬

Smoking is harmful to your health. ✬

Ultraviolet rays are harmful to us. ✬

Luckily, the treatment was only ineffective instead of harmful. ✬

I've heard that people can eat cat food without any harmful effects. ✬

Drinking is harmful for your health. ✬

This medicine has no harmful side effects. ✬

Cicadas aren't harmful to humans. ✬

Drunk in moderation, alcohol isn't harmful. ✬

According to this article, many tobacco companies knew nicotine was harmful, even back in the 50s. ✬