From The Economist, The World in 2014 - Great bores of tomorrow:
"In 2014 record lengths of tunnel will be bored - perhaps around 1,000 km (620 miles) in all. Boring machines will burrow beneath traffic-choked cities in China, India, the Middle East and Latin America, to bring new or expanded subway systems. Add the massive water, sewerage and other projects under way and the amount of tunnelling in 2014 will be perhaps double that of five years earlier, reckons Lok Home, the boss of Robbins, an American maker of bores."
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