If you think your home air is clean, devoid of pollutants (as I did once upon a time), re-think with the check-list of indoor pollutants discussed in this post. When was the last time you serviced your gas stove? Are you sure your house is free of dust mites? Before you answer ‘yes’ do you even know that you cannot see a dust mite without a microscope? How often do you spot cockroaches in your house? How many wooden furniture decorate your home? Are your building walls prone to rainwater seepage? Do you have pets at home? Do pigeons love your window sills? Does anyone smoke cigarette in your house? How ventilated is your house? Are you aware of house plants that can reduce indoor pollution?