Glossary D

The Environmental Glossary. Letter D +++ Popular Articles: 'Development', 'Disease', 'Durability'

A Delist is Use of the petition process to have a facility's toxic designation rescinded.

A Demand Side Management (DSM) is an attempt by utilities to reduce customers' demand for electricity or energy by encouraging efficiency.

A Demand-side Waste Management is Prices whereby consumers use purchasing decisions to communicate to product manufacturers that they prefer environmentally sound products packaged with the least amount of waste, made from recycled or recyclable materials, and containing no hazardous substances.

A demersal is fish that live on or near the ocean bottom. They are often called Benthic fish, groundfish, or bottom fish.

A Demineralization is a treatment process that removes dissolved minerals from water.

A demonstration field program is a collection of demonstration research projects to provide preliminary estimates of resource condition for one or more indicators applied to one or more resource classes over a standard Federal region.

A demonstration project is a field research project designed to provide preliminary estimates of a resource condition for a single indicator over a standard Federal region for one or more resource classes.

A Denitrification is the biological reduction of nitrate to nitrogen gas by denitrifying Bacteria in soil.

- Dense Non-Aqueous Phase Liquid (DNAPL) : A Dense Non-Aqueous Phase Liquid (DNAPL) is Non-aqueous phase liquids such as chlorinated hydrocarbon solvents or petroleum fractions with a specific gravity greater than 1.0 that sink through the water column until they reach a confining layer.

A Density is a measure of how heavy a specific volume of a solid, liquid, or gas is in comparison to water.