b.c. cities have world's cleanest air, says who - best air purifier

According to the World Health Organization, cities in BC have some of the cleanest air on Earth, which collects air quality data from thousands of cities around the world.
This week, the global health agency announced the ranking of 1,100 cities in 91 countries. C.
Of the world's ten largest cities, there are six, including Kitty Matt, Burns Lake, Houston, terrace, Nanaimo and Nelson.
The cleanest city in the world is Whitehorse in the Yukon.
The worst is the capital of Mongolia, Ulan Bator.
3 Kitimat: 4 Houston: 5 Burns Lake: 5 Terrace: 6 Nanaimo: 6 Nelson: 6 medicine cap: 6 Fredricton 6 Victoria: 7 Vancouver: 8 Halifax: 8 Ottawa: 9 Calgary: 9 Regina: 9 Moncton: 10 Edmonton: 11 Toronto: 13 Montreal: 19 Am countries Estonia topped the list with the best air quality and Mauritius ranked second, tied third with Australia.
David Reid works for the Ecological Society in Nelson.
Geography plays the same role as trees, he said.
"From the big picture, we are lucky to have the air quality we have," he said . ".
But Mr Reid says regulation and personal choices are also helpful.
"I think regulation is a big part of it.
"As individuals, we are becoming more aware of air quality in driving and consumption choices," Reid said . ".
"We must have air quality problems, such as old wood stoves and empty cars," he said . "
The list aims to highlight the need to reduce outdoor air pollution, which is estimated to result in 1.
34 million premature deaths each year.
The focus of this study is on the prevalence of PM10 particles, which are 10 micron or less particles that can penetrate the lungs and may enter the blood.
These tiny particles can cause respiratory problems and other diseases in humans, including heart disease, lung cancer and asthma.
Most of the top-ranked countries benefit from lower population density, favorable climate and stricter regulation of air pollution --
Conditions at the bottom of the list are not available.
"Around the world, the air in cities is often filled with soot, factory smoke or soot.
Burning power plant
In many countries, there are no air quality regulations, and where there are indeed air quality regulations, the national standards and implementation are very different . "
Maria Neira, WHO Director of Public Health and Environment, said in a press release.
The organization says investment to reduce pollution levels will soon be rewarded due to low incidence and health conditionscarecosts.