underwater diving, an alternative air source, or more generally alternative breathing gas source, is a secondary supply of air or other breathing gas...

An air source heat pump (ASHP) is a heat pump that can absorb heat from air outside a building and release it inside; it uses the same vapor-compression...

Alternative fuels, also known as non-conventional and advanced fuels, are fuels derived from sources other than petroleum. Alternative fuels include gaseous...

electricity generation will need to be produced from renewable sources. Renewables also cause much less air pollution than fossil fuels, improving public health...

Mobile source air pollution includes any air pollution emitted by motor vehicles, airplanes, locomotives, and other engines and equipment that can be...

The Special Air Service (SAS) is a special forces unit of the British Army. It was founded as a regiment in 1941 by David Stirling, and in 1950 it was...

Sharing air using an octopus regulator octopus regulator A secondary demand valve fitted to a diving first stage for use as an alternative air source for...

Source Code is a 2011 U.S. science fiction action thriller film directed by Duncan Jones and written by Ben Ripley. It stars Jake Gyllenhaal as U.S. Army...

leg linked by an articulating joint to a mooring. alternative air source A secondary supply of air or other breathing gas used by a diver in an emergency...

range from greenhouse gas emissions and air pollution to energy poverty and toxic waste. Renewable energy sources such as wind, hydro, solar, and geothermal...