Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or cause damage to the natural environment or built environment, into the atmosphere.
The sun`s ultraviolet rays are dangerous for the human health and for the wildlife. The layer of ozone acts like a shield which protects the earth against ultraviolet radiations which cannot reach the earth.
Realized by the pupils of School number 1, Bicaz, Romania, for the Comenius Project “How schoolchildren can contribute to keeping our planet green and clean” This project has been funded with support from the European Commission. This presentation reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein. “ When we heal the earth, we heal ourselves.” David Orr