Artesian well: Artesian well, well from which water flows under natural pressure without pumping. It is dug or drilled wherever a gently dipping, permeable rock layer (such as sandstone)
It is known to be the worst air-pollution event in the history of the United Kingdom, and the most significant in terms of its effect on environmental research, government regulation, and public awareness of the relationship between air quality and health. Bell, Michelle L. and Davis, Devra Lee. 2  Reassessment of the Lethal London Fog of 1952: Novel Indicators of Acute and Chronic Consequences of Acute Exposure to Air Pollution ( Environmental Health Perspectives , June 2001).
New Report: Richmond Area Among Most Polluted in Nation, State. Smog, also known as ozone, is a harmful air pollutant that leads to asthma attacks and exacerbates respiratory illnesses, especially among children and the elderly. Environment Virginia's report showed that smog pollution is a pervasive problem across the Commonwealth. The Richmond area ranked second only to the Washington, DC metro area, where 33 days were considered unhealthy to breathe. The report found that there were 25 days in 2010 when at least part of Virginia experienced smog levels exceeding the national health standard. Even relatively bucolic Charlottesville experienced 3 days of unhealthy air. Thus, more than 2 million Virginians were exposed to dangerous levels of air pollution last year.