Point Source: pipes from a power plant, leaking underground oil tank, paper factory, pollutants that come from a single site, Nonpoint Source: fertilizer run off, litter/trash, Pollutants that come from many places or unidentified sources, fertilizers from lawns and farms,

Point Source and Nonpoint Source Pollution Review

순위표

비주얼 스타일

옵션

템플릿 전환하기

자동 저장된 게임을 복구할까요?