The Ozone hole;
Flood;
Drought;
Earthquake;
Tornado;
Volcanic eruption;
Deforestation;
Water pollution;
Air and noise pollution;
Rubbish dump;
Factory emissions;
Exhaust fumes;
Water shortage;
Energy consumpton;
Overpopulation;
The melting of ice caps;
Extinction of endangered species;
domingo, 15 de novembro de 2009
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