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...aluminum - which are often more expensive still. The latest concretes have other advantages, including setting much faster. That's giving architects, engineers and builders far greater flexibility to use the material's long-lasting, thermal and acoustic properties in everything from pedestrian bridges to bus stations - and, in turn, contributing to big energy and other environmental savings. Some of the innovations are startling: the white concrete used by American architect Richard Meier for the Jubilee Church in Rome contains titanium dioxide, which keeps the concrete clean at the same time as destroying ambient pollutants such as car exhaust...
...only will those extra billions need to drink, they will also need to eat--and agriculture sucks up two-thirds of the world's water. They will need electricity too, and in the U.S., nearly half the water withdrawn on a daily basis is used for energy production--to turn the steam turbines in coal plants, for instance...
...crisis is more than just Australia's problem. The collapse of the country's harvest contributed to a doubling of the price of rice this past spring, which in turn led to food riots in countries like Indonesia, the Philippines and Egypt. And that's the real impact of water scarcity--food scarcity. It takes 150 gal. of water to grow a pound of wheat, up to 650 gal. for a pound of rice and 3,000 gal. to raise the equivalent of a quarter-pound of beef...
Still, for all Australia's water worries, citizens there don't yet need to fear that when they turn on the tap nothing will come out. That's not the case in India, even in the capital of New Delhi, which supplies about 200 million gal. a day less than its population requires. Water is a worry, not just for poor Indians but also for middle-class ones, like R.K. Sachdev, a retired civil servant who lives with his wife in an upscale development in the city's southwest. "Every morning when I get up, my main worry is water...
...this rare event, to bestow a deserved honor on one of the most committed American public servants in recent memory. As we, like Kennedy himself, set off into these next four years with cautious optimism and in the spirit of sacrifice, it is of vital importance that we also turn our gaze backward, to scan our history for guidance and glimmers of hope. In this search for inspiration, we could do far worse than the exemplary life of Ted Kennedy...