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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. Particulate air pollution is really a combination of solid and liquid particles which are suspended up which you breathe. It is best to classify air particles through the aerodynamic properties since these properties determine removing them through the air, and where they deposit in your the respiratory system. 3. How confident they may be Particulate air pollution is really a combination of solid and liquid particles which are suspended up which you breathe. It is best to classify air particles through the aerodynamic properties since these properties determine removing them through the air, and where they deposit in your the respiratory system.