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Wildfires in Canada Cause Air Pollution Crisis in North America
Recently, the northeastern United States has experienced some of the worst air pollution in decades. At about 11 a.m. on June 7, 2023, the visibility in New York City decreased significantly. By 1:00 noon, iconic buildings such as the Empire State Building and the Statue of Liberty could no longer be seen clearly. At 2 o’clock in the afternoon, the whole city was completely shrouded in an orange haze, full of “a sense of doom”. According to data released by the U.S. Environmental Protection Agency, the air pollution index of New York City, Syracuse, New York State, and some cities in neighboring Pennsylvania all exceeded 400 on that day, reaching…
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Air Pollution is a Global Problem with Serious Consequences
Air quality has always been the focus of everyone’s attention. The World Health Organization (WHO) 2021 edition of the “Global Air Quality Guidelines” (the latest version) recommends that the PM2.5 safety standard is an annual (long-term exposure) average concentration of 5 micrograms per cubic meter, and a 24-hour (short-term exposure) average concentration of 15 micrograms per cubic meter. Recently, scientists from Monash University in Australia published the results of a study showing that in today’s world, almost no piece of land and space is “pure land”. A study of fine particulate matter (mainly PM2.5) in the daily environment conducted by researchers shows that only 0.18% of the world’s land area…
