The U.S. Environmental Protection Agency's National Exposure Research Laboratory (NERL) is a national laboratory that conducts research and development

Research and development

The phrase research and development , according to the Organization for Economic Co-operation and Development, refers to "creative work undertaken on a systematic basis in order to increase the stock of knowledge, including knowledge of man, culture and society, and the use of this stock of...

 to find improved methods, measurements, and models to assess and predict exposures of humans and ecosystems to pollutants and other conditions in air, water

Water

Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a...

, soil

Soil

Soil is a natural body consisting of layers of mineral constituents of variable thicknesses, which differ from the parent materials in their morphological, physical, chemical, and mineralogical characteristics...

, and food

Food

Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals...

. It is one of three national laboratories that conduct research for EPA's Office of Research and Development.

External links

• EPA's National Exposure Research Laboratory (NERL) at the U.S. Environmental Protection Agency website.