At elevated temperatures carbon reacts with oxygen to form carbon oxides, and will reduce such metal oxides as iron oxide to the metal.. 
Yíyípo nitrogen n se apejuwe gbigbe ti eroja lati afẹfẹ sinu Biosphere ati awọn agbo ogun organic, lẹhinna pada sinu afẹfẹ.itan ati itumọ-ọrọnitrogen ni a kà ni deede pe o ti ṣe awari nipasẹ dokita ara ilu Scotland Daniel Rutherford ni ọdun 1772, eniti o pe ni afẹfẹ apanirun tabi afẹfẹ ti o wa titi.. 