The lux symbol is lx and is a standard unit of luminance. It is used in photometry as a measure of the perceived intensity of light. 1lx is approximately equal to 0.0929fc.

Refers to the mass of water in a particular volume of air. Absolute humidity is expressed as the number of kilograms of water vapor per cubic meter of air.

A device for measuring airflow or the pressure of moving air. The term is derived from the Greek word "anemos" meaning wind.

The luminous intensity, in a given direction, of a source that emits monochromatic radiation with wavelengths weighted to the standardized model of sensitivity of the human eye.

A chemical compound composed of one carbon and two oxygen atoms. It is often referred to by its chemical formula CO2 (the "2" is subscript).

A toxic, colorless, odorless, and tasteless gas. It consists of one carbon atom covalently bonded to one oxygen atom and has the chemical formula CO.

Candela

A thermometric scale in which the freezing point of water is 0°C and its boiling point 100°C at normal sea level atmospheric pressure (14.7 psi). °C = (°F-32)/1.8.

Carbon Monoxide

Carbon Dioxide