COVID 19 killed some 4.6 million people for the past 2 years. Air Pollution kills 7 million people each year. Both are important, but you do not see much attention given to the air pollution as a "killer".

Source: https://news.un.org/en/story/2021/09/1099152
Here's a map of the air pollution: https://www.iqair.com/unep

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Blue sky thinking: 5 things to know about air pollution

Around 90 per cent of people go through their daily lives breathing harmful polluted air, which has been described by the United Nations as the most important health issue of our time.

^{UN News}