CAUTION: Federal (U.S.A.) law restricts this drug to use by or on the order of a licensed veterinarian. DrontalÂ® Plus Taste TabsÂ® (praziquantel/pyrantel pamoate/febantel) Broad Spectrum Chewable Anthelmintic Tablets for Dogs are available in three tablet sizes. Each size is scored for convenient oral administration.
Ozone is also destroyed naturally in the stratosphere, being dissociated by ultraviolet radiation: This is the reaction that is responsible for O3's absorbtion of uv radiation that would otherwise reach earth.
These are mostly halogenated hydrocarbons which under the influence of high energy radiations break up to yield a chlorine atom. Chlorofluorocarbons are considered to be the most damaging pollutants of the stratosphere, as they persist in the atmosphere for periods as long as 150 years. A single chlorine atom can destroy 1, 00,000 ozone molecules.