In the past the country of Siduria has relied heavily on imported oil  Siduria recently implemented a program to convert heating systems from oil to natural gas  Siduria already produces more natural gas each year than it burns, and oil production in Sidurian oil fields is increasing at a steady pace
If these trends in fuel production and usage continue, ttherefore, Sidurian reliance on foreign sources for fuel should decline soon
All new homes that are being built will have natural-gas-burning heating systems.