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.
Reactive ion etching (RIE) is a directional etching process utilizing ion bombardment to remove material. This etch process is commonly used in the manufacturing of printed circuit boards and other micro fabrication procedures; the process uses a chemically reactive plasma in a vacuum chamber to aggressively etch in a vertical direction(down).