Editing Emissions trading (section)

====Volatile organic compounds====
[[File:Classification List of Organic Pollutants.png|thumb|276x276px|Classification of Organic Pollutants]]
In the United States the [[United States Environmental Protection Agency|Environmental Protection Agency]] (EPA) classifies [[Volatile organic compound|Volatile Organic Compounds]] (VOCs) as gases emitted from certain solids and liquids that may have adverse health effects.<ref name="EPA, OAR, ORIA, IED">{{Cite web|url=https://www.epa.gov/indoor-air-quality-iaq/volatile-organic-compounds-impact-indoor-air-quality|title=Volatile Organic Compounds' Impact on Indoor Air Quality {{!}} US EPA|last=EPA, OAR, ORIA, IED|first=US|website=US EPA|date=18 August 2014|access-date=2017-11-30|archive-date=2017-11-22|archive-url=https://web.archive.org/web/20171122160317/https://www.epa.gov/indoor-air-quality-iaq/volatile-organic-compounds-impact-indoor-air-quality|url-status=live}}</ref> These VOCs include a variety of chemicals that are emitted from a variety of different products.<ref name="EPA, OAR, ORIA, IED"/> These include products such as gasoline, perfumes, hair spray, fabric cleaners, PVC, and refrigerants; all of which can contain chemicals such as benzene, acetone, methylene chloride, freons, formaldehyde.<ref>{{Cite web|url=https://www.health.ny.gov/environmental/indoors/voc.htm|title=Volatile Organic Compounds (VOCs) in Commonly Used Products|website=www.health.ny.gov|access-date=2017-11-30|archive-url=https://web.archive.org/web/20180111012716/https://www.health.ny.gov/environmental/indoors/voc.htm|archive-date=2018-01-11|url-status=dead}}</ref>

VOCs are also monitored by the [[United States Geological Survey]] for its presence in groundwater supply.<ref name="Synthesis">{{Cite web|url=https://water.usgs.gov/nawqa/vocs/national_assessment/report/chapter1.html|title=Chapter 1 - Major Findings and Conclusions|last=Synthesis|first=NAWQA VOC National|website=water.usgs.gov|access-date=2017-11-30|archive-date=2017-05-18|archive-url=https://web.archive.org/web/20170518023924/https://water.usgs.gov/nawqa/vocs/national_assessment/report/chapter1.html|url-status=live}}</ref> The USGS concluded that many of the nations aquifers are at risk to low-level VOC contamination.<ref name="Synthesis"/> The common symptoms of short levels of exposure to VOCs include headaches, nausea, and eye irritation.<ref name="health.state.mn.us">{{Cite web|url=http://www.health.state.mn.us/divs/eh/indoorair/voc/|title=Volatile Organic Compounds (VOCs) in Your Home - EH: Minnesota Department of Health|website=www.health.state.mn.us|access-date=2017-11-30|archive-url=https://web.archive.org/web/20171201030617/http://www.health.state.mn.us/divs/eh/indoorair/voc/|archive-date=2017-12-01|url-status=dead}}</ref> If exposed for an extended period of time the symptoms include cancer and damage to the central nervous system.<ref name="health.state.mn.us"/>