1. AIR POLLUTION

2. SMOKE + FOG = SMOG Smog is a kind of air pollution and it had its origins at the beginning of the 18th century

3. Smog is harmful for all living beings, but not only. Indeed, cars and factories pollute a lot, although in these years cars pollute much less. The most polluted Italian city is Milan

4. Indeed, several times a year "green days” are organized , where you can go around the city center only walking or by bike

5. Smog causes a smoky dark atmosphere which arises over cities. It decreases visibility, and creates a haze throughout the area

6. If you want to learn more, you can watch this video http://www.youtube.com/ watch ?v=TwM9_3thvss where someone tells you about air pollution problems. (Elisa, Laura, Federica, Matteo, Federico, Piero)