China and India have two of the world's biggest populations and are also two of the worst polluters. One has made progress trying to clean up its act while the other has stalled; we take a closer look. Also in this edition: over 40 percent of children in Pakistan suffer from stunted growth. The condition can have long-term health effects but also economic consequences, as our correspondents report. Finally, a Taiwanese rock band denies lip-synching at a concert in China, an offence that could see it pay a fine or even be banned in the country. We speak to Beijing-based journalist Fabian Kretschmer.