The term 'ATMOSPHERIC LAYER WITH A 'HOLE' IN IT' can be summarized as the OZONE layer, which is a layer of gas in the Earth's atmosphere that contains high concentrations of OZONE molecules. This layer acts as a shield from the sun's ultraviolet radiation, protecting life on Earth from its harmful effects. Unfortunately, human activities have caused a hole to form in this layer, leading to increased levels of UV radiation and other environmental problems.