They are widely regarded as a world-class natural attraction containing marvellous stream passages formed by three rivers that sink underground on the slopes of Cuilcagh Mountain.

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It highlights ageing societies and a growing middle class, as well as diminishing natural resources, as key global themes.

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Greenberg believes that only by massively expanding government programs for the American middle class can the Democrats become a natural majority party.

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"The Net has emerged over the past four to five years as a natural delivery and learning tool, " says Class.com CEO John Blair.

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Today there are inflationary pressures rising from population growth, competition for energy and natural resources, and from the rising middle class of the Bric countries (Brazil, Russia, India and China).

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But until recently most voting was class voting, with each party guaranteed a solid base among its natural supporters.

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At the end of the day, Jordan was a world-class basketball player because that was the sport that best matched his natural ability, talent, and training.

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The country's steady economic and political advance since its restoration of democracy is leading to the development of a larger and more environmentally conscious middle class, a phenomenon which in richer countries has forced governments to take tougher action to conserve natural resources.

ECONOMIST: The economy booms, the trees vanish | The