In spite of Asia’s renown for producing the most advanced, gas-efficient cars on the planet, the growing popularity of car travel in China, Japan, Vietnam and their neighbors has led to serious air pollution and heath effects. Pollution kills 750,000 people in China every year, according to previously unreleased World Bank statistics, the Telegraph reports. At least 500,000 of those mortalities are due to outdoor air pollution, a fact the Chinese government sought to keep secret, fearing “social instability” were it known. Cars are a major culprit, and the situation has grown so dire that Xu Zongheng, mayor of Shenzhen, recently started asking its ten million residents not to buy any more cars. In Japan, a group of 522 asthma sufferers won a settlement in a landmark suit against the government and seven carmakers.