How better technology can make city air cleaner and help save lives

The world’s greatest environmental threat disproportionately harms women and children, particularly in the developing world: it is indoor air pollution.  The World Health Organization estimates that indoor pollution kills 4.3 million people a year, mainly because 2.8 billion people still use firewood, dung and coal for cooking and keeping warm, breathing polluted air inside their homes every day. Indoor air pollution from cooking and heating with open fires can cause harm equivalent to smoking two packs of cigarettes a day.

2013-11-06 One of the longest-running big picture debates is between optimists and pessimists  arguing the state of the world. Pessimists  have constantly painted a dystopian future from Malthus and Jevons to the 1972 book Limits to Growth. Optimists have cheerfully pointed to how everything is getting better. 

During the dry season, Dhaka is one of the most polluted cities in the world. Air pollution levels during this period of the year reach 13-16 times higher than the international quality standard, and that outdoor air pollution kills 14,000of the city's residents annually.

The need to reduce air pollution in the capital may seem obvious. But using scarce resources to fight outdoor air pollution means less funding will be available from the national budget, international donors, or private citizens for other proposals that can do good.