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Urban Ecology

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Sustainable Urban Development in the United States Last Updated on 2010-05-20 17:12:58 This article was researched and written by students at Allegheny College participating in the Encyclopedia of Earth's (EoE) Student Science Communication Project. The project encourages students in undergraduate and graduate programs to write about timely scientific issues under close faculty guidance. All articles have been reviewed by internal EoE editors, and by independent experts on each topic. Sustainable urban development may be defined as development which achieves lasting health in the physical,social and cultural environment of an urban community. Creating sustainable urban development is important in the United States because 80% of the population lives in urban areas. Most of these communities, in the past, have not been built to last or with the environment in mind. Examples are developments which have led to urban sprawl. The building sector uses about 40% of the... More »
Legionellosis Last Updated on 2008-03-24 17:45:08 Introduction Centers for Disease Control and Prevention The Centers for Disease Control and Prevention has assembled information that can answer questions about the bacterial disease Legionellosis, and about the organism that is its cause. Legionellosis is an infection caused by the bacterium Legionella pneumophila. The disease has two distinct forms: Legionnaires' disease, the more severe form of infection which includes pneumonia, and Pontiac fever, a milder illness. Legionnaires' disease acquired its name in 1976 when an outbreak of pneumonia occurred among persons attending a convention of the American Legion in Philadelphia. Later, the bacterium causing the illness was named Legionella. What is Legionnaires’ disease? Legionnaires’ disease (LEE-juh-nares) is caused by a type of bacteria called... More »