After wearing a disposable air pollution mask for two weeks, I am completely disgusted, and scared of the processes that happen in my lungs.

Air quality index at 12 times US government-recommended level and visibility low

Southern California went 87 days without a clean air day, the longest stretch of consecutive ozone pollution violations in at least 20 years. Regulators blame the persistence in pollution on hot, stagnant weather and are studying whether climate change is driving it.

Doctors urge ministers to act as 1,320 killed by asthma in England and Wales last year

Seniors, children and people with chronic health issues are advised to stay indoors and use air conditioning where possible.

As many as 29 people have died due to heatstroke in South Korea, according to the South Korean Ministry of Health, Welfare and Disease Control.