The BBC is sampling pollution levels in Beijing before and during the Olympics. The daily readings measure air particles known as PM10. The error margin is 20%. 26 August PM10 reading: 93 micrograms per cubic metre. (The World Health Organisation guideline maximum is 50 micrograms per cubic metre, averaged over 24 hours.) 25 August PM10 reading: 70 micrograms per cubic metre. We test for 10 minutes at midday from a seventh floor balcony in central Beijing. 24 August PM10 reading: 99 micrograms per cubic metre. 23 August PM10 reading: 12 micrograms per cubic metre. 22 August PM10 reading: 21 micrograms per cubic metre. 21 August PM10 reading: 56 micrograms per cubic metre. 20 August PM10 reading: 87 micrograms per cubic metre. 19 August PM10 reading: 39 micrograms per cubic metre. 18 August PM10 reading: 18 micrograms per cubic metre. Blue skies over Beijing after a hazy Sunday. 17 August PM10 reading: 54 micrograms per cubic metre. 16 August PM10 reading: 7 micrograms per cubic metre. (The World Health Organisation guideline maximum is 50 micrograms per cubic metre, averaged over 24 hours.) 15 August PM10 reading: 12 micrograms per cubic metre. 14 August PM10 reading: 46 micrograms per cubic metre. 13 August PM10 reading: 128 micrograms per cubic metre. 12 August PM10 reading: 41 micrograms per cubic metre. 11 August PM10 reading: 54 micrograms per cubic metre. 10 August PM10 reading: 278 micrograms per cubic metre. 9 August PM10 reading: 110 micrograms per cubic metre. 8 August PM10 reading: 156 micrograms per cubic metre. 7 August PM10 reading: 191 micrograms per cubic metre. 6 August PM10 reading: 186 micrograms per cubic metre. 5 August PM10 reading: 104 micrograms per cubic metre. 4 August PM10 reading: 292 micrograms per cubic metre. 3 August PM10 reading: 79 micrograms per cubic metre. 2 August PM10 reading: 15 micrograms per cubic metre. 1 August PM10 reading: 19 micrograms per cubic metre. 31 July PM10 reading: 56 micrograms per cubic metre. 30 July PM10 reading: 78 micrograms per cubic metre. 29 July PM10 reading: 8 micrograms per cubic metre. 28 July PM10 reading: 134 micrograms per cubic metre. 27 July PM10 reading: 269 micrograms per cubic metre. 26 July PM10 reading: 165 micrograms per cubic metre. 25 July PM10 reading: 261 micrograms per cubic metre. 24 July PM10 reading: 254 micrograms per cubic metre. Back 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 Next



E-mail this to a friend Bookmark with: Delicious

Digg

reddit

Facebook

StumbleUpon What are these?