2. I) What is the greenhouse effect and what is the problem caused by the greenhouse effect? ICECAP MELTDOWN

3. The greenhouse gases are mainly water vapor (H2O),carbone dioxide (CO2),methane (CH4) and nitrous oxide (N2O).

5. II) What is the ozone layer? THE CHILIANS LIKE « HOT-DOG »

6. II) What is the ozone layer? The code of colors is: -green: no danger -yellow: warming white skin can’t stay in the sunlight more than 20 minutes without protection. - salmon: look out, it’s necessary to protect your head, her body, his arms and legs, to wear protect glasses. -red: danger, stay at home, and to try not go out.