Radio spectrum pollution is the straying of waves in the radio and electromagnetic spectrums outside their allocations that cause problems for some activities. It is a specialised form of light pollution, and of particular concern to radio astronomers. Pollution is the release of environmental contaminants. ... Before flue gas desulfurization was installed, the emissions from this power plant in New Mexico contained excessive amounts of sulfur dioxide. ... Acid rain (or more accurately acid precipitation)[1] occurs when sulfur dioxide and nitrogen oxides are emitted into the atmosphere, undergo chemical transformations and are absorbed by water droplets in clouds. ... An air quality measurement station in Edinburgh, Scotland The Air Quality Index (AQI) is a standardized indicator of the air quality in a given location. ... Atmospheric dispersion modeling is performed with computer programs that use mathematical equations and algorithms to simulate how pollutants in the ambient atmosphere disperse in the atmosphere. ... The haloalkane (also known as halogenoalkanes) are a group of chemical compounds, consisting of alkanes, such as methane or ethane, with one or more halogens linked, such as chlorine or fluorine, making them a type of organic halide. ... NASA photograph showing aircraft contrails and natural clouds. ... Global mean surface temperatures 1856 to 2005. ... Severe haze affecting Ampang, Kuala Lumpur, Malaysia in August 2005 Moon over red and blue haze For other uses, see Haze (disambiguation). ... Indoor Air Quality (IAQ) deals with the content of interior air that could affect health and comfort of building occupants. ... Global monthly average total ozone amount The term ozone depletion is used to describe two distinct but related observations: a slow, steady decline of about 3 percent per decade in the total amount of ozone in Earths stratosphere during the past twenty years; and a much larger, but seasonal... Aerosol pollution over Northern India and Bangladesh - Photo: NASA Particulates, alternatively referred to as particulate matter (PM), aerosols or fine particles, are tiny particles of solid (a smoke) or liquid (an aerosol) suspended in a gas. ... Victorian London was notorious for its thick smogs, or pea-soupers, a fact that is often recreated to add an air of mystery to a period costume drama. ... Roadway air dispersion is applied to highway segments Roadway air dispersion modeling is the study of air pollutant transport from a roadway or other linear emitter. ... Water pollution Water pollution is a large set of adverse effects upon water bodies (lakes, rivers, oceans, groundwater) caused by human activities. ... Eutrophication is apparent as increased turbidity in the northern part of the Caspian Sea, imaged from orbit. ... It has been suggested that this article or section be merged into Hypoxia (medical). ... Pumping of highly toxic (dark black) sludge, much seeps back into the ocean in the form of particles. ... Ocean acidification is the name given to the ongoing decrease in the pH of the Earths oceans, caused by their uptake of anthropogenic carbon dioxide from the atmosphere. ... Volunteers cleaning up the aftermath of the Prestige oil spill An oil spill(also called a oil slick) is the unintentional release of oil (generally, petroleum) into the natural environment as a result of human activity. ... Ships can pollute the waterways and oceans in many ways. ... Runoff flowing into a stormwater drain Surface runoff is water, from rain, snowmelt, or other sources, that flows over the land surface, and is a major component of the water cycle[1][2]. Runoff that occurs on surfaces before reaching a channel is also called overland flow. ... Fishkill from receiving waters Thermal pollution is a temperature change in natural water bodies caused by human influence. ... Wastewater is any water that has been adversely affected in quality by anthropogenic influence. ... Waterborne diseases, according to the World Health Organization, are those which generally arise from the contamination of water by feces or urine, infected by pathogenic viruses or bacteria, and which are directly transmitted when unsafe water is drunk or used in the preparation of food. ... Water quality is the chemical and physical characterization of water. ... Water stagnation occurs when water stops flowing. ... Excavation of leaking underground storage tank causing soil contamination Soil contamination is the presence of man made chemicals or other alteration to the natural soil environment. ... Bioremediation can be defined as any process that uses microorganisms, fungi, green plants or their enzymes to return the environment altered by contaminants to its original condition. ... This article or section does not cite its references or sources. ... A cropduster spreading pesticide. ... The radiation warning symbol (trefoil). ... This article about actinides in the environment is about the sources, environmental behaviour and effects of actinides in the environment. ... The environmental radioactivity page is devoted to the subject of radioactive materials in man and his environment. ... Map of hypothetical fallout dispersal after a large-scale nuclear attack against the United States. ... Radiation Hazard symbol. ... This time exposure photo of New York City shows sky glow, one form of light pollution. ... Noise pollution, usually called environmental noise in technical venues, is displeasing human or machine created sound that disrupts the environment. ... Visual pollution is the term given to unattractive visual elements of a vista, a landscape, or any other thing that a person might want to look at. ... A Clean Air Act describes one of a number of pieces of legislation relating to the reduction of smog and atmospheric pollution in general. ... The Clean Water Act, 33 U.S.C.A. § 1251 et seq. ... Kyoto Protocol Opened for signature December 11, 1997 in Kyoto, Japan Entered into force February 16, 2005. ... This act gave authority to Surgeon General to make programs to reduce or eliminate water pollution in rivers, underground rivers, and other waterways. ... This is a list of environmental organizations, organizations that preserve, analyze or monitor the environment in different ways. ... The Department for Environment, Food and Rural Affairs (Defra) is the United Kingdom government department responsible for environmental protection, food production and standards, agriculture, fisheries and rural communities. ... EPA redirects here. ... Global Atmosphere Watchs logo The Global Atmosphere Watch (GAW) is a worldwide system established by the World Meteorological Organization – a United Nations agency – to monitor trends in the Earths atmosphere. ... This article is becoming very long. ... The National Ambient Air Quality Standards (NAAQS) are standards established by the United States Environmental Protection Agency that apply for outdoor air throughout the country. ... This article does not cite its references or sources. ... Legend: γ = Gamma rays HX = Hard X-rays SX = Soft X-Rays EUV = Extreme ultraviolet NUV = Near ultraviolet Visible light NIR = Near infrared MIR = Moderate infrared FIR = Far infrared Radio waves: EHF = Extremely high frequency (Microwaves) SHF = Super high frequency (Microwaves) UHF = Ultra high frequency VHF = Very high frequency HF = High... This time exposure photo of New York City shows sky glow, one form of light pollution. ... An astronomer or astrophysicist is a person whose area of interest is astronomy or astrophysics. ...

See also

• Frequency allocation