Safe Levels
To ensure that the a safe level is maintained , monitoring stations are situated across the sydney region , that record and analyse the levels.
With the continuation of monitoring the levels of carbon monoxide in the air , levels have slowly reduced which is a positive sign , but with the rise in population and the more and more cars on the road monitoring has to become more effective to ensure that the levels stay at the World Health Organisation's recommended levels .
With the continuation of monitoring the levels of carbon monoxide in the air , levels have slowly reduced which is a positive sign , but with the rise in population and the more and more cars on the road monitoring has to become more effective to ensure that the levels stay at the World Health Organisation's recommended levels .