The support about which a lever pivots.

Fugitive emissions are leaks and other irregular releases of gases or vapors from a pressurized containment - such as appliances, storage tanks, pipelines, wells, or other pieces of equipment - mostly from industrial activities.

By making an emulsion with water the mixture viscosity is dramatically reduced, enabling it to be pumped at ambient temperature in warm countries.

Air–fuel ratio is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process.

An air source heat pump is a type of heat pump that absorbs heat from a colder place and release it into a warmer place using the same vapor-compression refrigeration process and same external heat exchanger with fan as used by an air conditioners.

Air quality laws govern the emission of air pollutants into the atmosphere.

Air pollution is the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials.

The air mass coefficient is commonly used to characterize the performance of solar cells under standardized conditions, and is often referred to using the syntax "AM" followed by a number. "AM1.5" is almost universal when characterizing terrestrial power-generating panels.

An air handler, or air handling unit, is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system.

A particulate air filter is a device composed of fibrous, or porous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air.

The density of air or atmospheric density is the mass per unit volume of Earth's atmosphere.

Air cooling is a method of dissipating heat.

Air conditioning is the process of removing heat and controlling the humidity of the air within a building or vehicle, in order to achieve a more comfortable interior environment.

A pneumatic device for producing air for higher pressure work, compressed air is fed to a pressure vessel where it will be stored until used.

An air basin is an area within a ring or partial ring of mountains that in the absence of winds holds air and smog within the area.

Agrivoltaics is co-developing the same area of land for both solar photovoltaic power as well as for agriculture. The coexistence of solar panels and crops implies a sharing of light between these two types of production.

Aerodynamics is the study of motion of air, particularly when affected by a solid object, such as a wind turbine blade.

The aerodynamic force which acts perpendicular to the direction of wind flow.

The aerodynamic force which acts parallel to the direction of wind flow.

In the field of physics, engineering, and earth sciences, advection is the transport of a substance or quantity by bulk motion of a fluid.