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Those that support animal testing claim that is really a necessary practice. They explain that companies that depend upon animal testing do use humane techniques to feed, house and care for the animals. Supporters also declare that alternatives to animal testing are not as far reaching, lacking to be able to figure out how cosmetic products affect living tissue and organs. The automobile is often a complex machine comprised of different components each having a specific role. Fuel is processed within the engine where it is changed into souped up that moves the vehicle. Exhaust from your combustion process is filtered to render emissions less harmful to the environment. The transmission system feeds more power to the engine for the car to increase its acceleration.