'In the 1970s it was discovered that CFCs may be affecting this layer of atmosphere'
the ozone layer
IN THE AIR UP THERE: In the 1970s it was discovered that CFCs may be affecting this layer of atmosphere
In the 1970s it was discovered that CFCs may be affecting this layer of atmosphere
In the 1970s it was discovered that CFCs may be affecting this layer of atmosphere
IN THE AIR UP THERE
the ozone layer
IN THE AIR UP THERE