The man produces a range of substance on the one hand, the benefits in convenience and protection, and secondly because the damage often destroy the surrounding environment. Such is the case of aerosols containing chlorofluorocarbons (CFC) gases used in this case, as a means of propulsion and also in refrigeration. In 1974 it was discovered that these gases act upon layer of another gas in the atmosphere and acts as a filter for ultraviolet radiation from the sun, threatening life on Earth: ozone. In the atmosphere, each atom of chlorine from CFCs, released by the aerosols, combined with an ozone molecule and produces an intermediate compound which subsequently reacts with an oxygen atom to clear the initial chlorine atom. This is again combined with another molecule of ozone and thus created a chain reaction. Thus, the use of CFC weakens the ozone layer and other damage causing skin cancer, immune disorders and visual problems. Today CFCs are being replaced with HCFC compounds twenty times less harmful than the previous.
Many compounds such as insecticides, pesticides and paints in addition to certain perfume materials are marketed as sprays to ease of use.