N ew World Health Organization (WHO) guidelines have reset criteria for acceptable air pollution. The guideline for nitrogen dioxide has been reduced by 75% and that for particulate matter (PM2.5) pollution has been
It would be easy to focus on the most polluted places in the world and I think that clean air is impractical. But the WHO guidelines are based on air pollution conditions that already exist . For example, particulate pollution levels in many cities in North America North andScandinavia already meet the new guidelines. Many large cities, including Vancouver, Honolulu and Stockholm, also have very low particulate matter pollution.
One thing they have in common is their estrangement. Particulate pollution can stay in the air for a week or more, which means that a city's air pollution affects its neighbors. This is a challenge for the Densely populated UK and Western Europe. The pollution inhaled in Cardiff today may have been produced yesterday in London or in Paris and tomorrow it could be in Newcastle or Amsterdam. Cities will have to take responsibility for their pollution in the wind . They must work together and work with the rural areas around them, from the same way that river pollution should be managed from source to the sea .
It is also clear that we cannot meet the guidelines by just focusing on transport and industry. As Professor Stefan Reis of the UK Center for Ecology and Hydrology explained, meeting UK guidelines "will require action across Europe to reduce It will be essential to control emissions from agriculture and residential burning, in addition to further reducing traffic emissions. "
This has been picked up by Professor Ally Lewis of the UniverYork site. “The center and south-east of England, as well as our close neighbors in Europe, are densely populated and particulate pollution easily crosses s, which means that international cooperation is vital. However, we are a long way from meeting the goals of improving air quality, and there are relatively easy targets for improving public health.
"It is indefensible that as a society we have chosen to inefficiently burn solid fuels i.e. wood or coal, in houses in cities, mainly because it looks good. And while vehicle pollution decreases over time, we will live with the internal combustion engine for decades. Getting older, more polluting vehicles off the road is a clear and guaranteed victory for air quality. "