Question

4. How can you conclude that the air of a particular place is unsuitable for breathing?

please help. ​

Answer 1

Answer:

Air pollution is one of the greatest environmental risk to health. By reducing air pollution levels, countries can reduce the burden of disease from stroke, heart disease, lung cancer, and both chronic and acute respiratory diseases, including asthma.The lower the levels of air pollution, the better the cardiovascular and respiratory health of the population will be, both long- and short-term.The WHO Air Quality Guidelines: Global Update 2021 provide an assessment of health effects of air pollution and thresholds for health–harmful pollution levels.In 2019, 99% of the world population was living in places where the WHO air quality guidelines levels were not met.

Explanation: