However the concentrations of ozone are very different in the two places - in the stratosphere it naturally peaks at about 8 parts per million while at ground level it is measure in parts per hundred million. Ozone in the stratosphere is beneficial - it protects the Earth from ultraviolet radiation. At ground level, ozone is a poisonous gas that can cause inflammation of the respiratory system in higher animals and reduce plant growth. Correcting false statements Working in groups of two or three, decide whether the following statements are true or false. Keep a note of your decisions and write out a correct version of the false statements.
Ozone consists of oxygen atoms.
Ozone is poisonous. Methane destroys the ozone layer. Chlorofluorocarbons are greenhouse gases. Ozone concentrations are highest in the troposphere. Ultraviolet radiation is highest at the equator.