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1. An estimated 70,000 chemicals are used in the world, and the chemical industry introduces about 200 to 1,000 new chemicals each year.
2. People are exposed to a number of chemicals in our homes, at work, and in the general environment. Trace amounts of toxic chemicals are present in the food, air, and the drinking water.
3. Exposure to toxic substances occurs through three major routes:
i. The skin (dermal absorption
ii. The respiratory tract (inhalation)
iii. The digestive tract (ingestion)
4. Other routes of exposure to toxics include: eye contact and injection
marto answered the question on March 21, 2019 at 06:08
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