It's an investment that we need to make for better health. Every year in early January the smog is so thick that AQI reaches 500. So, schools are closed for 10-15 days and students are advised to stay indoors.

You will need to buy air purifiers according to your house.

In three bedroom apprtment two air purifiers are enough for me.

You can get a good quality air-purifier for $100.

Thank you for reading!