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Recently, many mega-cities in China are suffering from heavy soot-laden smog including small particulate matter such as PM2.5. First reason is that there must be a very stable atmospheric condition with weak vertical exchanges of air between a boundary layer and upper layer that leads to the formation of fogs and haze. Second reason is the very...

Since the end of the 1990s, the Sino-Russian border regions have witnessed a dramatic, unprecedented increase in cross-border timber trade that has made Russia the largest log supplier for China's expanding wood industry sector. Driving factors include: severe constraints in China's domestic wood supplies, the availability of rich forest resources...

Shanghai is one of the largest prosperous cities in China with the population over 17million. From the 1940’s the major urban planning strategy is trying to de-centralize the overcrowded population in the central part of the city, where the density was even as high as 70000 people/sq.km, now decreased to 40000 people/sq.km. The still very high...