Global isish
ifloslanish! transport, samolyotlar,
zavodlar.
o'rmonlarni kesish
zavodlar, transport va shunga o'xshash narsalar
yonayotgan moylar, katta dvigatelli mashinalar, fabrikaning chimnidagi tutun va hokazo
ifloslanish
to'qimachilikning tutuni, smog, hisoblab bo'lmaydigan avtomobillar soni..