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A meteoric heat wave, a Richmond bog fire, and forest fires in Eurasia and Alaska resulted in an accumulation of tropospheric ozone, which is smog, in some areas. parts of southwestern British Columbia. an opinion on air quality for the eastern parts of the Greater Vancouver Area and the Fraser Valley
"Ground – level ozone is not emitted directly into the. air, "says Metro Vancouver on its website. "It forms when nitrogen oxides (pollutants emitted when fuels are burned) and volatile organic compounds (emitted by solvents) react in the air in the presence of sunlight." The highest levels of tropospheric ozone are generally observed. "
Smog should last a few days
The British Columbia Government's air quality quality index predicts badessments of 4 for later today, tonight and tomorrow in the northeast. Metro Vancouver South and Central and East Fraser Valley are expected to reach 5 later today, tonight and tomorrow
CAS indicates health risks not only caused by smog, but also in the northwest. also particulates and nitrogen dioxide
Evaluations of 4 to 6 are characterized as "moderate risk".
This means that people with heart or respiratory problems should consider reducing or rescaling
Ratings from 7 to 10 are considered "high risk" and any index above 10 is "very low". high risk.
According to the 1945-19004 report of Caring for the Air quality has improved in recent years as the population has grown.
Sulfur dioxide emissions have decreased significantly as a result of stricter regulation of marine fuels. Carbon Monoxidide and Nitrogen Dioxides are also declining in recent years as smog levels increase.
"This is partly due to an increase in ozone formed outside of Canada". Metro Vancouver and its partners have developed a ground – level ozone reduction strategy to address this problem.
Concentrations of tropospheric ozone remain lower than they were in the 1980s and early 1990s.
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