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Refers to a variety of chemical elements (also known as chemical elements), the elemental composition of compounds and mixtures, whether natural or artificial, are all chemicals. Around the world there as many as 7 million kinds of chemicals, which have been listed as a commodity more than 10 species, often there are over 70,000 kinds of use, and now emerging around the world every year there are 1,000 kinds of chemicals.
Chemicals are everywhere, and are an essential component of our daily lives. At the same time, some chemicals can severely damage our health. Others could be dangerous if not properly used. There is a worrying increase in health problems that can be partially explained by the use of chemicals. Some man-made chemicals are found in the most remote places in the environment, but also in animals and humans.
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