Over the past decade or so, water pollution abatement programs have been responsible for significant and sometimes dramatic improvement s in the water quality of many receiving water bodies. However, as point sources of pollution are being reduced throught attainment of secondary ang sametimes tertiary apparent of municipal and industrial wastewaters, other less apparant sources are decoming increasingly threatening to many benefical water uses.

LOKASI: Ruang Koleksi Umum
Rak: 4