Karachi, PakistanThe average PM 2.5 pollution of Pakistan is 101 micrograms per cubic meter as per the air sample collected in 2010.
Doha, QatarDoha the capital of Qatar is not a recommended city for travelers with existing health issues.
Kabul, AfghanistanKabul, the capital of Afghanistan is a highly polluted city in terms of air quality.
Baghdad, IraqBaghdad is one of the most unhygienic cities to travel to. Air quality is highly polluted and the Mercer Health and Sanitation Index score is 39.
Mexico city, MexicoWith Mercer health and sanitation index score 37.7, Mexico City is tagged as one of the most unhygienic cities of the world.
New Delhi, IndiaThe Mercer health and sanitation index score of New Delhi stands 46.6.
Colombo, Sri LankaEmission of fuel by vehicles that contribute to more than 60% of total toxic releases.
Mumbai, IndiaIt has earned a Mercer health and sanitation index score of 38.2 pushing it to dreaded zone for contracting diseases.
Baku, AzerbaijanThe Mercer health and sanitation index score for Baku is 27.6 and it is considered one of the filthiest cities.