- The Columbia River Plateau, sometimes called the Columbia River Basin, is a broad plateau in Washington State where the Columbia River rolls its way between the Cascade Mountains and the Rocky Mountain foothills. Extensive infrastructure projects along the river have transformed this semi-arid sagebrush steppe into a literal powerhouse of energy and agriculture.
- Chemical compound (Wikipedia)
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element is therefore not a compound. A compound can be transformed into a different substance by a chemical reaction, which may involve interactions with other substances. In this process, bonds between atoms may be broken and/or new bonds formed.