It has not been confirmed what the noxious chemical was but three people were treated in hospital as a precaution.

The higher ones employ all sorts of noxious chemicals.

There's no burning and therefore fewer noxious chemicals involved.

But these are likely to be the 'tip of a very large iceberg' of potentially noxious chemicals, they write.

Older pots, for example, could have been mixed with other types of plastic which might give off noxious chemicals and need to be treated separately.

And it's not just the noxious emissions from their cars that bother you.

Noxious emissions of other kinds thicken the book's atmosphere.

The company has so far nibbled round the edges, upgrading its turbines to improve thermal efficiency - the energy extracted per unit of coal burnt - and cutting noxious emissions.

The noxious smell, which caused vomiting and nausea, was actually created by rotting food reacting with disinfectant.

If nobody took the hint he would return and let off a room-filling noxious smell that soon had the guests reaching for their coats.

A person with damage to the part of the brain that processes taste or smell may perceive a persistent bitter taste or noxious smell.

When they trained the algorithm on the chip using ten noxious smells, it learnt and could distinguish each of them, including methane, ammonia and acetone.

Do they spit venom or emit noxious smells?

He was given a one-year suspended jail sentence yesterday after he admitted administering a noxious substance.

Officers already at the independent school on a separate inquiry are said to have found a 'noxious substance' in the staff room kettle.

He admitted administering a noxious substance with intent.

The complex was rocked by claims a 'noxious substance' had been added to meals.

Three people have been arrested and bailed on suspicion of possession of a noxious substance.