A hole has opened in the ozone layer over the Arctic due to a 'polar vortex' causing unusually freezing temperatures in parts of the atmosphere. The European Space Agency backed Copernicus Atmosphere Monitoring Service (CAMS) has been following the 'unusual ozone hole' since it first formed. It comes as record-breaking low levels of ozone are recorded over the northern most part of the Earth at about 11 miles above the ...