According to the 2023 World Air Quality Report, which is the second most polluted country in the world?

Correct Answer: B. Pakistan 

According to the 2023 World Air Quality Report, Pakistan is the second most polluted country in the world, with an average PM2.5 concentration of 73.7 micrograms per cubic meter (μg/m³). This is more than 14 times higher than the World Health Organization (WHO) PM2.5 annual guideline. The report also found that Pakistan’s air quality has deteriorated from last year when the PM2.5 concentration was 70.9 µg/m3. In 2023, only seven countries met the WHO PM2.5 air pollution guideline, including Bangladesh, which is ranked as having the fifth-worst air quality, and India, which is ranked eighth.