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).
It is from morphine that heroin is made. Morphine is made into heroin with a chemical reaction containing the chemical compound acetic anhydride. The heroin is then purified using chemical or mechanical means.pium and morphine, from which heroin is made, come from a variety of sources: 1  Afghanistan-leading illegal opium and heroin exporter producing up to 82% of the world's supply. 2  Pakistan, Southeast Asia, South America-other illegal sources.