Fighting for clear air

Smog and pollution levels in Beijing have reached unbelievable levels. When PM2.5 (suspended particulate matter smaller than 2.5 micrometer) level in the atmosphere reaches 300, it is considered hazardous for human health. In Beijing, the PM2.5 level reached 900 at the height of the recent "smog attack". In Shanghai, where I live with my family, things are better than Beijing, but still not good. Cities across China experience similar problems. We need to curb pollution now.

For the last couple of years, the focus has been on long-term solution, new research and smarter designs to reduce environmental pollution. These efforts should not only continue, but also be intensified. But they would still not be enough. In China, we need effective solutions and we also need a change of mentality.