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.
However, CFCs damage ozone in the ozone layer when they escape into the atmosphere. This allows more ultraviolet radiation to reach the Earthâs surface. When scientists discovered that CFCs damage the ozone layer, they suggested that CFCs should be banned.FCs have some useful properties. For example: they are chemically inert (unreactive). they have a low boiling points (so they turn into gases easily). they are insoluble [insoluble: Unable to dissolve (usually in water).] in water. These properties made CFCs very useful in the past.