Read the following passage and decide if the statements that follow are true or false In Britain,natural gas is the most popular fuel for heating homes and for cooking. It is piped all over the country from the gas fields below North Sea. Natural gas is used chiefly as a direct source of energy, although it is also used in the chemical industry(c«ng nghiÖp ho¸ häc). At the moment, the supply is plentiful, but it will be running short by the end of the century, and will run out during the 21ST century unless new supplies are found. We could do without natural gas, as coal(than ®¸) gas can be used as a substitute, and there should be enough coal to last for several centuries. However, it is a form of enegry wich is not only cheap but also efficient. 1natural gas is used for heating homes and for cooking 2 It comes from the sea 3 gas is used chiefly as asource of solar energy 4 natural gas is expensive