it's an internet thing! est 1999
A revolutionary gadget has been designed to provide real-time feedback on your surrounding smog.
Schools and businesses in Beijing were completely shut down as the first ever extreme smog warning was issued in the Chinese capital.
Those with lung and heart problems are asked to avoid strenuous activity as air quality falls to its lowest possible level across Britain.
China's northern city of Harbin, Heilongjiang province, has seen its schools and airport shut down to dangerous levels of smog.
Air pollution in the city-state reached record levels. Singapore warns that the haze could last for weeks.