Carcinogens refers to chemicals which primarily cause reproductive disorders. Most cancer risks are modifiable through changes in human behavior. The best estimate for the contribution of pollution to cancer risk is around two percent of the total risk. Chemical pollutants contribute substantially to cancer risk. Reservoirs are those living organisms or inaminate objects that provide the conditions where the organisms may survive, multiply, and also provide the conditions necessary for transmission.
Falls are the leading causes of accidental deaths in the home.
Environmental disease refers to any pathologic process having a characteristic set of signs and symptoms which are detrimental to the well-being of the individual and are the consequence of many factors, including exposure to physical or chemical agents, poor nutrition and social or cultural behaviors. Protein is the basic informational macromolecule that is the basis of heredity whose chemical structure has been known for more than 45 years. Since every individual within each species is very much a representation of the information contained in the genome together with the expression of those genes in the development of that individual, all the genotypic changes are harmful or damaging. One of the most well-known cytogenetic defects is trisomy 21 or Down's disease which is characterized by the addition of an extra chromosome to chromosome number 21. Most teratogens exert their effect during certain critical time windows in the late stages of tissue and organ formation known as organogenesis.