Worldwide existing about 5.7 million natural gas vehicles.(Argentina, Brasilia and Pakistan together count 4.2 million!)
w ɜː l d w aɪ d WORD_BOUNDARY ɛ ɡ z ɪ s t ɪ ŋ WORD_BOUNDARY ʌ b aʊ t WORD_BOUNDARY f aɪ v WORD_BOUNDARY s ɛ v ə n WORD_BOUNDARY m ɪ l iə n WORD_BOUNDARY n æ t̠ʃ ə ɹ ɹ ə l WORD_BOUNDARY ɡ æ s WORD_BOUNDARY v iə k ə l z WORD_BOUNDARY ɑ ɹ d̠ʒ ə n t iː n ə WORD_BOUNDARY b ɹ æ s ɪ l iə WORD_BOUNDARY æ n d WORD_BOUNDARY p æ k ɪ s t æ n WORD_BOUNDARY t ə ɡ ɛ ð ə ɹ WORD_BOUNDARY k aʊ n t WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY t uː WORD_BOUNDARY m ɪ l iə n WORD_BOUNDARY