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Though the concept of animal testing might seem trivial, tests are less simple as smearing cold cream or lip gloss for the face of the rabbit. Animals found in laboratory testing, often proceed through extremely painful experiments and millions die every year. Those that survive the experiments don't get set free, instead they may be euthanized. In cosmetic animal testing; rabbits, guinea pigs, mice and rats can be used. Tests are done on finished products and individual ingredients to look for the products amount of toxicity and power to cause eye or skin irritations, allergies along with other harmful effects. Mausoleum smells are from the decomposition process, which occurs naturally as the body undergoes the decaying process. Morticians frequently call the offending bodies, "leakers". These mausoleum odors can be terribly overwhelming, and for that reason in the embalming chemicals and also the gases coming due to decomposition, they're able to along with that pose a health hazard to workers and visitors.