For the Beijing Olympics, vehicles not meeting the Euro 1 emission standards were banned, and the odd-even rule was implemented in the Beijing administrative area. Air quality improvement measures implemented by the Beijing government included replacing coal with natural gas, suspending construction, imposing strict dust control on construction sites, closing or relocating the polluting industrial plants, building long subway lines, using cleaner fluid in power plants, and reducing the activity by some of the polluting factories. There, levels of primary and secondary pollutants were reduced, and good air quality was recorded during the Beijing Olympics on most days. Beijing also sprayed silver iodide in the atmosphere to induce rain to remove existing pollutants from the air.
For the Beijing Olympics, vehicles not meeting the Euro 1 emission standards were banned, and the o.dd-even rule was implemented in the Beijing administrative area. Air quality improvement measures implemented by the Beijing, government included replacing coal with natural gas, suspending construction, imposing strict dust control on construction sites closing or relocating the polluting industrial plants, building long subway lines, using cleaner fluid in power plants, and reducing the activity by some of the polluting factories. There, levels of primary and secondary pollutants were reduced, and good air quality was recorded during the Beijing Olympics on most days. Beijing also sprayed silver iodide in the atmosphere to induce rain to remove existing pollutants from the air