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Paramilitary police take photos on their basketball court near the entrance to the ancient Forbidden City during the first snowfall of the winter in Beijing, 30 December 2006. China experienced some of its deadliest weather in years in 2006 and climate experts expect the extreme conditions to continue, state media recently reported, as the country's worsening pollution problems add to its woes. Northern China is experiencing its worst acid rain in 14 years and Beijing has been ranked the dirtiest major city in the world, by micrograms of particles of pollution dust per cubic meter, with 142, compared to the World Health Organisation guideline of 20 micrograms, in a recent Asian Development Bank conference. AFP PHOTO/Frederic J. BROWN Get premium, high resolution news photos at getty

412 Micrograms Stock Photos, High-Res Pictures, and Images - Getty

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413 Micrograms Stock Photos, High-Res Pictures, and Images - Getty

413 Micrograms Stock Photos, High-Res Pictures, and Images - Getty

413 Micrograms Stock Photos, High-Res Pictures, and Images - Getty

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