layer – n. amount of something spread over an area

ultraviolet – adj. rays of light that cannot be seen

chlorofluorocarbon – n. an organic compound that damaged the ozone layer

aerosol – n. a substance like hair spray kept in a container under pressure that is released in a fine spray when a button is pushed

confident – adj. a feeling or belief you can do something well

global – adj. involving the entire world

greenhouse gas – n. a gas in the atmosphere that absorbs and emits radiation, causing greenhouse effect and warming of Earth’s temperature
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