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English definition of “greenhouse gas”

greenhouse gas

noun [C or U]
 
 
ENVIRONMENT
one of several gases, especially carbon dioxide, that prevent heat from the earth escaping into space, causing the greenhouse effect: We need a global system for limiting greenhouse gas emissions. Radical steps to reduce greenhouse gases will have a huge effect on the economy.
→ Compare climate change, global warming
(Definition of greenhouse gas from the Cambridge Business English Dictionary © Cambridge University Press)
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