Grappling with Ammonia in China's Haze
Chicken farmers and auto designers follow different career paths, but soon both may be changing how they do their jobs as part of a campaign to clean up China's polluted air.Emissions from poultry waste and auto engines alike can contain potentially harmful levels of ammonia, a colorless gas with a pungent smell that's getting new attention as part of the country's battle
Source: chinafile.com