What Scent Keeps Horseflies Away? Horseflies are painful pests that feed on the blood of all mammals, including humans. The flies trace and find their prey by targeting the prey's appearance, movement and smell. Most fly control methods target the horsefly's olfactory senses.
CFCs. Chlorofluorocarbon (CFC) is an organic compound that contains carbon, chlorine, and fluorine, produced as a volatile derivative of methane and ethane. A common subclass is the hydrochlorofluorocarbons (HCFCs), which contain hydrogen, as well.
The ozone layer is essential for complex living organisms (like you and me) to exist. Without the ozone layer, all but very simple life forms would be destroyed by the action of ultraviolet light. Some chemicals, particularly CFCs, destroy ozone in the upper atmosphere.A CFC is a chlorofluorocarbon molecule. It is similar to an alkane with all the hydrogen atoms replaced with chlorine and fluorine atoms.In the presence of ultraviolet light a CFC molecule will decompose producing highly reactive chlorine free radicals.These chlorine free radicals will react with ozone molecules and turn them back into oxygen molecules.he ozone layer is essential for complex living organisms (like you and me) to exist. Without the ozone layer, all but very simple life forms would be destroyed by the action of ultraviolet light. Some chemicals, particularly CFCs, destroy ozone in the upper atmosphere.