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An air quality index ( AQI) is an indicator developed by government agencies [1] to communicate to the public how polluted the air currently is or how polluted it is forecast to become. [2] [3] As air pollution levels rise, so does the AQI, along with the associated public health risk. Children, the elderly and individuals with respiratory or ...
AMP Energy — Powered by Mountain Dew (UK) 2013–2017 A citrus-flavored energy drink variant released under the 'AMP' brand in the U.K. in August 2013 by PepsiCo. Rather than being an entirely separate brand as is the case with its North American counterpart — the U.K. version of AMP Energy was released under the 'Mountain Dew' brand. It ...
Hydrogen sulfide is a chemical compound with the formula H 2 S.It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs.
The purple martin ( Progne subis) is a passerine bird in the swallow family Hirundinidae. It is the largest swallow in North America. Despite its name, the purple martin is not truly purple. The dark blackish-blue feathers have an iridescent sheen caused by the diffraction of incident light [2] giving them a bright blue to navy blue or deep ...
Liquefied petroleum gas. Liquefied petroleum gas, also referred to as liquid petroleum gas ( LPG or LP gas ), is a fuel gas which contains a flammable mixture of hydrocarbon gases, specifically propane, n -butane and isobutane. It can sometimes contain some propylene, butylene, and isobutene. [1] [2] [3]
Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF 2. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncommon. The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 4 as fluorite.
This is a partial list of awareness ribbons.The meaning behind an awareness ribbon depends on its colors and pattern. Since many advocacy groups have adopted ribbons as symbols of support or awareness, ribbons, particularly those of a single color, some colors may refer to more than one cause.