The very high building costs for gas tankers, as well as for the plant and equipment needed for liquefaction, storage, and distribution of the liquefied gas, together with the long payback periods, have induced the gas-importing countries in Western Europe, the USA and Japan to conclude long-term contracts with the supplying countries.
Indleko eziphezulu zokwakha itanki lerhasi nezotyalo nezixhobo ezifunekayo ukunyibilikisa, ukugcina nokusasazo lwerhasi enyityilikisiweyo kunye nokuziphindezela kwexesha iyakubangela amazwe athutha irhasi kumazwe eNtshona Europe ,USA ne Japan agqibe isivumelwano sexesha elide namazwe axhobisayo