It is one of the largest sources of greenhouse gases, responsible for 18% of the world's greenhouse gas emissions as measured in CO2 equivalents.
ɪɾ ɪz wˈʌn ʌvðə lˈɑːɹdʒɪst sˈoːɹsᵻz ʌv ɡɹˈiːnhaʊs ɡˈæsᵻz, ɹᵻspˈɑːnsᵻbəl fɔːɹ ˈeɪtiːn pɚsˈɛnt ʌvðə wˈɜːldz ɡɹˈiːnhaʊs ɡˈæs ɪmˈɪʃənz æz mˈɛʒɚd ɪn sˌiːˈoʊ tˈuː ɪkwˈɪvələnts.