The researcher Yuming Guo (Professor at the School of Public Health and Preventive Medicine at Monash University in Melbourne, Australia) offers this week concrete figures that demonstrate the worrying extension of the problem of air pollution worldwide to the point that, According to their research published in The Lancet Planetary Health, only 0.18% of the global land surface (or 0.001% of the world’s population) is exposed to pollution levels that are below the limit that the World Health Organization (WHO) that it considers safe from 2021 (5 micrograms per cubic meter (µg/m3) in the annual concentration and from 25 micrograms per cubic meter to 15 in one day).

Analyzes PM2.5 particles, very small particles, with a diameter of 2.5 micrometers or less (thus finer than a human hair) and are a mixture of chemicals, dust, soot or metals that can come from burning fossil fuels and other activities. Due to their tiny size, they easily penetrate the lungs and can even enter the bloodstream, making them particularly dangerous for people with respiratory and heart problems.

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