Effects of Ozone Depleting Substances (ODS) by Consuming Refrigeration and air conditioning, Foam blowing & Cleaning solvents

Ozone depleting substances include chlorofluorocarbons (CFC), hydrochlorofluorocarbons (HCFC), hydrobromofluorocarbons (HBFC) and halogenated hydrocarbons (halons). ODS are generally very stable in the troposphere and only degrade under intense UV-light.

Possible application
- Refrigeration and air conditioning
- Foam blowing
- Cleaning solvents

Effects for Human & Environment
By the action of UV-light halogen-radicals are liberated. These radicals then can destroy ozone molecules through a variety of catalytic cycles. Below there is shown the simplest example of such a cycle with a chlorine atome that reacts with the ozone.



It has to be considered that the halogen radical acts catalytic. This means that a single halogen atom would keep on destroying ozone for up to over a year.
The overall effect is a decrease in the amount of ozone, which brings about the ozone depletion! Hereby it is suspected that various biological consequences such as increases in skin cancer and damage to plants may result from higher UV exposure (ozone layer absorbs UVB light from the sun).

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