The smell of gas on the street may make many of us hold our breath. But when it comes to pollution (污染的), your own home may be just as bad.
People spend most of their time indoors. But your home can be two to five times as polluted as the air outside, says the US’ Environmental Protection Agency.
Poor indoor air quality can cause (引起) health problems. And a lot of these problems are caused by what is in your house.
To make your home healthy, here are some useful tips:
