Roughly half of U.S wetlands are located along the Gulf Coast and serve as critical habitat for 75 percent of migratory waterfowl entering the country.
Etching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (relief) in the metal.In modern manufacturing, other chemicals may be used on other types of material.tching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (relief) in the metal.
v. etched, etchÂ·ing, etchÂ·es. v. tr. 1. a. To cut into the surface of (glass, for example) by the action of acid, especially by coating the surface with wax or another protective layer and drawing lines with a needle and then using the acid to form the lines on the unprotected parts of the surface.b. To make or create by this method: etch a design on glass. 2.o cut into the surface of (glass, for example) by the action of acid, especially by coating the surface with wax or another protective layer and drawing lines with a needle and then using the acid to form the lines on the unprotected parts of the surface. b. To make or create by this method: etch a design on glass.