Via The Local.se: Stockholm tied for world's least polluted capital: WHO. Excerpt:
Data used to compile a pair of new reports by the World Health Organization (WHO) suggests that Stockholm is one of the cleanest capital cities on the planet.
The "Inheriting a Sustainable World" and companion "Don't pollute my future!" reports paint a damning picture of the impact of pollution on our health, showing that more than one in four deaths of children worldwide can be attributable to an unhealthy environment.
Indoor and outdoor air pollution, second-hand smoke, unsafe water, lack of sanitation and inadequate hygiene take the lives of 1.7 million children under the age of five, the WHO studies show.
"A polluted environment is a deadly one – particularly for young children. Their developing organs and immune systems, and smaller bodies and airways make them especially vulnerable to dirty air and water," WHO Director-General Dr Margaret Chan said in a press release.
The WHO's data suggest that Stockholm is one of the better places to live when it comes to air pollution however. The WHO rates the Swedish city's annual mean particulate matter with an aerodynamic diameter of 2.5 μm or less (tiny PM2.5 pollution particles which can only be seen under a microscope) as 6 μg/m3 – the joint lowest for any capital city alongside Wellington, New Zealand.
Canberra, Australia and Ottawa, Canada registered slightly higher levels of the PM 2.5 particles (7 μg/m3), as did Edinburgh, Scotland; Montevideo, Uruguay and Tallinn, Estonia (8 μg/m3). The top 10 of capitals was rounded off by Monaco and Helsinki, Finland (9 μg/m3), followed by Madrid, Spain (10 μg/m3).