general knowledge refresher
general knowledge refresher Published this article page no 93 Controlling the anthropogenic releases of mercury throughout its lifecycle is one of the key obligations under the Convention. It is a UN treaty. The Convention also addresses interim storage of mercury and its disposal once it becomes waste sites contaminated by mercury as well as health issues. India has ratified the Convention. a Swiss group that measures air quality levels based on the concentration of Particulate Matter (PM) 2.5. Key findings Bangladesh was the most polluted country in the world in 2021. Bangladesh recorded an average PM2.5 level of 76.9 micrograms per cubic metre in 2021 against the World Health Organisation (WHO) recommended maximum permissible level of 5 micrograms per cubic metre. Earlier in 2018 2019 and 2020 also Bangladesh was found to be the most polluted country in the world. The data reveals that not a single country in the world managed to meet the WHOs air quality standard in 2021. All over the world 93 cities reported PM 2.5 levels at 10 times the recommended level. Among the cities Dhaka was the second most polluted city in the world with a PM 2.5 level of 78.1 just below New Delhi which had a PM 2.5 level of 85.1 in 2021. Performance of India New Delhi continues to be the worlds most polluted capital city for the fourth consecutive year. As per the report in 2021 India was home to 11 of the 15 most polluted cities in Central and also in South Asia. 35 Indian cities have been listed by the index under the worst air quality tag for 2021. Bhiwadi Rajasthan topped this list and was followed Ghaziabad Uttar Pradesh. Concerns associated with air pollution Air pollution is now considered to be the worlds largest environmental health threat accounting for seven million deaths around the world every year general knowledge refresher buy.
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