5 reasons why indoor air is worse than outdoor air 
                     z
5 Reasons Why Indoor Air Pollution Is 
Worse Than Outdoor Air Pollution
Indoor builds up more pollutants as 
z compared to the outdoor
Indoor build up more 
pollutants as compared to the 
outdoor due to the factors 
such as building 
construction, materials used , 
furnishing and synthetic 
material used.
Mold and humidity are the culprits for 
z indoor air pollution
Mold spores are a 
common problem at 
old buildings and 
humid environment 
exposure to which, can 
cause wheezing and 
certain allergies.
Poor ventilation due to stuffed spaces 
z
In indoors, houses 
are sealed and there 
is a little space for an 
exchange of outdoor 
air in the indoor 
environment due to 
poor ventilation.
Outdoor sources contributing to the 
z indoor air pollution
Outdoor sources like smoke 
from vehicles and chimneys 
enters the house through open 
doors, windows and cracks in 
the house. Dust also comes 
along with the shoes when 
someone comes from outside.
Usage of several household products 
z containing VOCs
One can find many 
household products such 
as room fresheners, 
perfumes, spray etc. 
containing VOCs which can 
damage kidney, liver and 
central nervous system.