Some of the most popular Techniques to make our air more fresh and pure are:
For outdoors
• Plant more and more trees
• Insist on taking public transport whenever possible
Even cigarette smoking and excessive use of air conditioners can hamper the air quality of outdoors.
For indoors
• Keep your spaces well ventilated
• Avoid excessive use of chemicals
Besides this, nowadays people have also started using Air Purification System for Home which is the most advanced way to keep your indoors free from bad quality of air.