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BEIJING -- Beijing is to spend up to US $20 billion to change the Chinese capital into a 21th century one for the 2008 Olympics. The government managed to host the 2008 s. The general aim is for Beijing to have the same environmental standards as Paris, London or Washington by 2008. Hundreds of millions of dollars will be spent to pipe natural gas to the city’s homes, taking away dirty coal burning gradually while 60 000 buses will be changed to liquefied(液化的)gas. The money also will be used for relocating the polluting factories and building green belts. By 2008 around 90 percent of Beijing’s waste will be treated, compared to only 40 percent at present. Olympic officials have already announced that around 50 large projects are being dealt with to improve traffic congestion and cut down pollution. They include construction of Beijing’s first light railway, a 40.5-kil-ometer-long line which was completed in 2005. Beijing, besides, plans to build an 82.25-kilometer-long subway to add to the existing 53 kilometers. Nine major roads will be rebuilt or widened. Beijing also plans to build a 70-meter-wide green belt among the waterways to protect water quality as well as increase the green areas.

From the last three paragraphs we know the fact that ______.