We usually think of air pollution as being outdoors, but our indoor air quality is often worse , Sources of indoor pollution include ammonia, formaldehyde, volatile organic compound, benzene etc,they can be up to 10 times worse for you than the air outside.Since we spend an average of 80% of our time indoors,to purify the air and eliminate pollution is very important thing for us.
Charcoal carving is 'activated carbon'. This...
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