Everyone has learned at secondary schools about photosynthesis and how important this is for healthy air. Plants take just CO2 (carbon dioxide) and dealing O2 (oxygen) from. Do you want to increase your oxygen level in or around your home. Rather than plants in the living room or garden. Incense and scented candles can make your home smell wonderful but the chemicals it contains are less chilly. Choose therefore prefer candles made from beeswax , these are natural and contain fewer chemicals and are therefore better for the air.