Put air purifier in your house or room, if you can afford. Breathing exercise should help but you can't stop yourself breathing bad air. AQI of country is out of your control, you can not change people or government, so change the country if you can, but mindful of it, accept the rules and cultures of the country you move in, don't drag your culture on people's face living in the new country. If you can't do any of that, then I mean you can't do anything about AQI.