(chemistry) carbon

carbon neutrality

plural of taxe carbone

carbon tax

carbon paper (sheet of paper used to make carbon copies)

plural of papier carbone

carbon copy (copy produced in an alternated stack of ordinary sheets of paper and carbon papers) / carbon copy (duplicate copy of an email)

carbon emissions trading; carbon market

carbon monoxide (CO)

(Internet) blind carbon copy (copy of an email message that is sent to a person (often one of many) other than the primary recipient without the express knowledge of the other recipients)