This is because of the policies regarding their oil that are followed by the oil exporting countries and because natural gas, which is environmentally more satisfactory, will become more widely used.
Kungenxa yenkqubo enanze i-oyile yabo ilandelwe ngamazwe athumela i-oyile nokuba yendalo, eyanelisayo ngokobume bendawo, iyakusetyenziswa ngokuvulekileyo.