Carbon monoxide: It is produced by the waste gases of the motor vehicles and by the industial
emissions. It provokes headache, nausea, psychomotor and breathing troubles, weakness. It is able to join in a stronger way than
the oxygen to the iron of the hemoglobin of the red blood cells and, if it is absorbed in
great quantities, it can provoke death.
Hydrocarbons: they are produced by the bad functioning
of the burners of the household heating, by the bad working of the motor vehicles engines
and by the industrial emissions. They provoke respiratory disturbs and cancerogenic diseases.