highly compressed steam
121Fuel cell — For other uses, see Fuel cell (disambiguation). Demonstration model of a direct methanol fuel cell. The actual fuel cell stack is the layered cube shape in the center of the image A fuel cell is a device that converts the chemical energy from a… …
122Airship — For other uses, see Airship (disambiguation). Dirigible redirects here. For the 1931 film, see Dirigible (film). Not to be confused with Balloon (aircraft) or Blimp. Airship …
123Fire apparatus — A fire apparatus, fire engine, fire truck, or fire appliance is a vehicle designed to assist in fighting fires, by transporting firefighters to the scene, and providing them with access, water or other equipment. In some areas, the terms fire… …
124Saw — For other uses, see Saw (disambiguation). Saw A crosscut hand saw about 620 mm (24 inches) long Classification Cutting Types Hand saw Back saw Bow saw Circular saw …
125Baker's yeast — Saccharomyces cerevisiae, the yeast commonly used as baker s yeast.  Gradation marks are 1 µm apart Baker s yeast is the common name for the strains of yeast commonly used as a leavening agent in baking bread and bakery products, where… …
126Fountain — For other uses, see Fountain (disambiguation). the Jet d eau, in Geneva (1951), rises 140 meters (459 feet) above Lake Geneva …
127Firefighting — Distinguish from a firefight, which means a battle with firearms. Firefighting is the act of extinguishing destructive fires. A firefighter fights these fires to prevent destruction of life, property and the environment. Firefighting is a highly… …
128Sustainable energy — Renewable energy …
