炭たん素そクレジット

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Meanings

1

noun

A permit allowing the holder to emit a certain amount of carbon dioxide or other greenhouse gases; often traded in emissions trading schemes.

charcoal, coal

素elementary, principle, naked

排はい出しゅつ権けん
排出権 is a broader term for 'emission rights', while 炭素クレジット specifically refers to tradable certificates for carbon emissions.
カーボンクレジット
カーボンクレジット is a direct loanword from English 'carbon credit' and is used interchangeably with 炭素クレジット, though the latter is a hybrid Japanese-English term.

Compound of 炭素 (carbon) and クレジット (credit), a calque from English 'carbon credit'.