Acid rain- imaginea 2(sus)
Deforestation- imaginea 4(jos)
Toxic waste- imaginea 1(jos)
Hunting- imaginea 1(sus)
Oil spills- imaginea 3(sus)
traffic fumes- imaginea 2(jos)
smog- nu e
glabal warming- imaginea 4(sus)
aerosols- imahinea 3(jos)
