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Health is the level of functional or metabolic efficiency of a living organism. In humans, it is the general condition of a person's mind and body, usually meaning to be free from illness, injury or pain (as in "good health" or "healthy"). The... » Read More
Chemicals are the building blocks of life. They are present in us, all around us, and in every product we buy. Human beings and animals are made of chemicals; cooking food is all about chemistry; the drugs that prevent and treat illnesses are made... » Read More