Natural Ozone Killers
British research has shown that large quantities of ozone-depleting bromine came from sea salt and iodine oxide from bright orange algae that coat the underside of Antartica. Scientists have already identified over 3,500 natural ozone killers produced by bacteria, algae, fungi, lichens and insects. Together they are to blame for about 30% of the depletion of the ozone layer. The odd thing is that the sources detected so far are insufficient to explain the concentrations of natural ozone-hostile substances actually measured in the atmosphere. Scientists from Heidelberg University's Institute of Environmental Geochemistry may have run the missing source to ground. The answer lies in the soil. The natural ozone killers are also called CFCs just like the things that humans make that kill the ozone.