¿Sabéis cuales son?
AIR POLLUTION
is caused by
| FIRE fuego | 
| CAR (smoke) coches (humo) | 
| SMOKE humo | 
| VOLCANO (smoke) volcán (humo) | 
| CUT TREES - DEFORESTATION cortar árboles - deforestación | 
| FACTORIES fábricas | 
WATER POLLUTION 
is caused by
| PLASTIC plásticos | 
| PETROL gasolina | 
| CHEMICALS productos químicos | 
| SEWAGE aguas residuales | 
| RUBBISH basura | 
 
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