For the 2008 Beijing Olympics, when China clamped down on factory emissions and instituted an odd-even ban on vehicles, lung function improved within two months, with fewer asthma-related visits to the doctor and less cardiovascular mortality.
Kwa Michezo ya Olimpiki ya Beijing ya 2008, wakati Uchina ilipunguza uzalishaji wa gesi kutoka kwa kiwanda na kuweka marufuku isiyo ya kawaida ya magari, utendakazi wa mapafu uliboreka ndani ya miezi miwili, na ziara chache zinazohusiana na pumu kwa daktari na kupungua kwa vifo vya moyo na mishipa.