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| The CCTV building in downtown Beijing. The skies returned to gray on Tuesday, yet the air is cleaner than a year ago. |
The temporary measures that Beijing has taken to improve air quality in the lead-up to the Olympics seem to be having some payoff. Saturday and Sunday, August 2 and 3, were beautiful, clear days with blue skies. By Tuesday, however, the skies over the downtown area were gray again as an inversion settled over the city. Still, the air is cleaner than last year. The results of the temporary measures reveal both how nice it is to have clearer skies and how easy in fact it is to make some inroads into the air pollution. The temporary measures point the way to simple permanent measures that could make the air quality better sustainably.
First, Beijing has taken the worst polluting trucks off the road. In recent years China has raised its vehicle standards beyond even what California has – but an important catch is that the higher standards are for new vehicles. There are many old, heavy polluting vehicles on the road. It is in China’s interest to bar these vehicles from large cities starting right now.
Second, it is possible to identify some major polluting factories. These have been temporarily shut down for the Olympics. The smart long-term policy is to either require stronger scrubbers/emissions control on these plants and/or to use zoning regulations to prevent their location anywhere close to major populations.