0 a substance that causes cancer: --
The American government classifies both asbestos and environmental tobacco smoke as class one carcinogens.
1 a substance that can cause cancer (= a serious illness that causes tissues and cells to grow too quickly) --
We may demand that every nation adopt a polluter-pay principle; but the pollution tax, for the same carcinogen in the same industry, will generally be different.
The products of genetic engineering are organic creatures, not chemical pollutants or carcinogens (unless they are specifically designed to produce such substances).
On the other hand, carcinogens which act directly on genetic material would be viewed with much more suspicion.
An animal model was sought that would maintain test sensitivity for identifying carcinogens but would be less resource intensive.
For example, we may quite legitimately place controls on exposure to low level carcinogens, even if their effect on human health has not been proven.
Natural carcinogens and toxins are never produced by accident in plants or microbes.
This agent is a well-known carcinogen with conflicting indications of its mutagenic activity.
There are in general three main groups of carcinogens (producing or initiating cancer): chemicals, radiation, and microbes.
