VOA慢速英语:Growing Minds Need Greener Spaces

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