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vegetation – n. plants in general : plants that cover a particular area
environmental epidemiology – a field of science concerned with the discovery of how environmental exposures add to or protect against injuries, sicknesses, developmental conditions, disabilities, and death
data – n. facts and statistics collected together for reference or analysis
attention span – n. the length of time during which someone is able to think about or remain interested in something
factor – n. something that helps produce or influence a result : one of the things that cause something to happen
