Before revision: Contaminant A contaminant is a substance present in nature at a level higher than fixed levels or that would not otherwise be there.Glossary to the Buzzards Bay Watershed Management PlanAmerican Meteorological Society.
After revision: မြန်မာပြန်Contaminant A contaminant is a substance present in nature at a level higher than fixed levels or that would not otherwise be there.Glossary to the Buzzards Bay Watershed Management PlanAmerican Meteorological Society.