The most polluted country in 2022 was bangladesh. India was the 5th most polluted country in the world. Nepal and china were the 10th and 12th most polluted countries in the world respectively.

5 levels in most polluted countries worldwide 2020-2021. Bangladesh had an average pm2. 5 concentration of 76.9 micrograms per cubic meter of air (µg/m3) in 2021, making it the most polluted country in the world.

However, most of this pollution comes from just a few countries: china, for example, generates around 30% of all global emissions, while the united states is responsible for almost 14%. In the ranking below you can find the 10 countries that produce the most emissions, measured in millions of tons of co2 in 2019.

• Eritrea
• Papua New Guinea
• Uganda
• Ethiopia
• Somalia

Australia topped the list as the least polluted country in the world, with 7 cities in the top 25. Of the 25 least polluted cities in the world with the best air quality, nordic countries (finland, sweden, norway, iceland, estonia) dominated the rankings with some of the cleanest air in the world in 2022.

The most polluted city in the world is a notable climber in saudi arabia, with dammam averaging 124.11 micrograms of pm2.5 as it was ranked 11th last year. The number of indian cities on the top 25 list decreased from 10 to 9 as one chinese city joined the list.

By 2050, outdoor air pollution particulate matter and ground-level ozone is projected to become the top cause of environmentally related deaths worldwide. A study showed that with no change in emissions by 2050, 1,126,000 premature mortalities are expected each year due to ozone8.

• Dammam, Saudi Arabia (124.11 µg/m3
• Lahore, Pakistan (111.63 µg/m3
• Dhaka, Bangladesh (84.73 µg/m3
• Delhi, India (84.39 µg/m3
• Muzaffarnagar, India (81.35 µg/m3
• Baghdad, Iraq (77.62 µg/m3
• Ghaziabad, India (74.72 µg/m3
• Patna, India (67.20 µg/m3

• Switzerland. As per the Environment Protection Index, Switzerland is ranked as one of the top environmentally friendly country with the EPI score of 81.5
• Sweden
• Norway
• Japan
• Finland
• Denmark
• New Zealand
• Germany

Australia topped the list as the least polluted country in the world, with 7 cities in the top 25. Of the 25 least polluted cities in the world with the best air quality, nordic countries (finland, sweden, norway, iceland, estonia) dominated the rankings with some of the cleanest air in the world in 2022.

• Dammam, Saudi Arabia (124.11 µg/m3
• Lahore, Pakistan (111.63 µg/m3
• Dhaka, Bangladesh (84.73 µg/m3
• Delhi, India (84.39 µg/m3
• Muzaffarnagar, India (81.35 µg/m3
• Baghdad, Iraq (77.62 µg/m3
• Ghaziabad, India (74.72 µg/m3
• Patna, India (67.20 µg/m3

China, the united states, and india are three of the biggest emitters of carbon dioxide (co2), accounting for nearly half of all emissions.

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• Switzerland. #1 in Safe. #1 in Best Countries Overall
• Denmark. #2 in Safe. #10 in Best Countries Overall
• New Zealand. #3 in Safe. #11 in Best Countries Overall
• Norway. #4 in Safe. #13 in Best Countries Overall
• Sweden. #5 in Safe. #5 in Best Countries Overall
• Finland. #6 in Safe
• Canada. #7 in Safe
• Netherlands. #8 in Safe

The singapore government will impose a carbon tax from 2019 to cut its greenhouse gas emissions and make companies more competitive as global agreements on climate change take effect. According to government, the tax would be levied on all facilities producing 25,000 tonnes or more of greenhouse gas emissions a year.

Data from the u.s. Energy information administration tracks where the u.s. Imports from the most. Of the 7.86 million barrels per day the u.s. Imported in 2020, the majority came from its north american neighbors: canada, with 4.13 million barrels (52.5%), and mexico, with 750,000 (9.6.

The majority of these pollutants are emitted through human activities like burning fossil fuels, vehicle exhaust fumes and emissions from agriculture and industry.