Gwnaeth sector Diwydiant a Busnes Cymru allyrru 14.0 miliwn tunnell o Garbon Deuocsid a’i gyfatebol (MTCO2e) yn 2018. Hynny yw, 36% o holl allyriadau nwyon tŷ gwydr Cymru yn 2018.  O fewn y sector Diwydiant a Busnes, diwydiant haearn a dur Cymru oedd yn gyfrifol am 43% (6.01 MTCO2e) o holl allyriadau’r sector yn 2018.
In 2018, Industry and Business sector emissions in Wales were 14.0 Million Tonnes of Carbon Dioxide equivalent (MTCO2e). This represents 36% of total Welsh greenhouse gas emissions in 2018. Within the Industry and Business sector, the Welsh iron and steel industry represented 43% (6.01 MTCO2e) of the sector total emissions in 2018