nuisible 用英语:

noxious chemicals

Exhaust gases of a car are noxious.

We often eat foods which are harmful to our health without knowing it.

Luckily, the treatment was only ineffective instead of harmful.

There's a chance that tap water may contain harmful substances like chlorine and lead.

Insecticides are agricultural chemicals that exterminate insects harmful to plants.

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

Forests regulate the water cycle and take away harmful carbon dioxide.

The group put up posters to remind people that noise is harmful.

harmful to health

Let's remove harmful books from circulation. Starting first with the bibles that have spread all over the world.

TV is harmful in that it keeps your mind in a passive state.

You only have to make a few foreign friends to understand how harmful national stereotypes are.

I find those comments very exaggerated and very harmful.

Some groups of people are trying to stop it because they think it’s harmful and unfair.

Encyclopedia of things considered harmful.

Strontium 90: One of the radioisotopes of strontium; part of radioactive fallout, harmful to human health.