Chemicals move through the environment to reach people directly through water, the air, dust etc.
Most of the world environment as we know it is the result of human interventionand hence human activities, for example in agriculture, have a profound effect on environmental transfer processes. You should be aware of the complexity of possible environmental interactions and effects. You should know what information is required to assess possible environmental and health damage. You should know the limitations of the information currently available. Introduction Most toxicological information available relates to direct effects of chemicals on human beings, their domesticated animals, and laboratory bred mammals used for toxicity testing.