Change trend of vegetation cover in Beijing metropolitan region before and after the 2008 Olympics. Cooling and Humidifying Effects of Five Landscape Plant Communities on Summer Days in Beijing The status of chemical and biological factors and mesocosm experiment of eutrophication to cause bloom in the area for the Olympic sailing games in Qingdao Analysis of plant species composition in Beijing Olympic Forest Park Dynamics of atmospheric PM2.5,NOX,CO during the Beijing Olympic Games