389 Every year the Gas Industry produces some 11/2 million tons of tar—and tar not only covers thousands of miles of British roads, but is the raw material from which come over 2,000 valuable and vital substances. GAS MAKES THE MOST OF BRITAIN'S WEALTH The carbonisation of coal in a gasworks it such an efficient way of releasing its heat energy that every year each gas-equipped home in Great Britain on the saves the mining of 13/4 tons of precious coal. APART from its versatility, flexibility and cleanliness, gas, as a fuel for industry, has other virtues, less obvious but just as important.