Let’s clear the air

While many people assume pollution is just an outdoor problem, your home and office can also be polluted. “As a society, we make sure that our houses are well-insulated, but we don’t think enough about exposure to all the things we place in our homes,” says Susan Olesik, Professor of Chemistry and Biochemistry at Ohio State University.

The air quality in and around buildings and structures has a big effect on your health, and while you can feel the symptoms – shortness of breath, dizziness, nausea – right away, other health effects can come on years after exposure, according to the US Environmental Protection Agency (EPA).

Clear out old cigarette smoke

Pulmonologist Dr Sumita Khatri notes that one of the most common indoor air pollutants is cigarette smoke, though newer e-cigarettes are another source. The vapour emitted when someone smokes e-cigarettes releases chemicals linked to lung disease. That rule also applies to previous occupants of your home who may have smoked.

“We have all heard of secondhand smoke, this is called thirdhand smoke,” she says. If you have a room that has been exposed to residual smoke, make sure to change the fabric or carpet, which can be a risk to children or people with chronic heart and lung problems.

Water indoor plants sparingly

Overwatering can contribute to the growth of mould, and any water that leaks on to the floor invites mould growth as well, says Olesik. Put pebbles on top of the soil to discourage mould spores from getting into and polluting the air, walls and floor.

If the mouldy areas in your house are less than about three square metres, you can handle the job yourself.

Clean under your fridge

The tray under the fridge is a veritable mould magnet. Adding salt reduces the growth of mould and bacteria. Clean under the refrigerator occasionally to get rid of dust and mould, and make sure your cleaning products are environmentally friendly, advises Dr Khatri. “Cleaning products can also be harmful, so consider green and natural cleaning products which release less harmful chemicals and fumes,” she says.

Freshen air naturally

Air fresheners and scented candles contain trace amounts of hazardous chemicals, though in amounts lower than most guidelines, so it’s OK to use them on occasion, says Oleski. But she warns against overdoing either approach to fresher air.

“It’s better to open the window if the weather allows.” If not, turn on the AC. Air conditioners remove mould-friendly moisture and filter allergens entering the house. Just make sure to clean or change the filters often or you’ll just make things worse.

Give stuffed toys a deep freeze

That teddy bear could be riddled with dust mites! Regularly slip stuffed toys into a freezer bag and let them chill for three to five hours. The cold will kill any dust mites that could contribute to indoor air pollution, according to a 2017 report in the Journal of Allergy and Clinical Immunology.


Regularly throw out or give away coats and other clothing you haven’t worn in ages. Put sports equipment in the garage where it belongs. When you have finished, you should be able to see all your closet floors and back walls.

“Minimising clutter is a great way to improve air quality because it allows you to see dust and other contaminants that might be invisible,” says Dr Khatri. Now give everything a good vacuum and you’ll have significantly reduced the amount of dust in your house and cut down on your indoor air pollution.

Leave shoes by the door

Mud isn’t the only thing you track into your home, notes Oleski. Parking your shoes by the door keeps your floors clean and reduces indoor air pollution, especially pesticides tracked in from outdoors. “You know those signs that say ‘keep dogs off lawn?’” They should also apply to people,” she says.

Keep your pets clean

Just like you take off your shoes, always make sure to wipe off your pet’s paws when they come in from being outdoors. Towelling off their coat can also help prevent the spread of pollen indoors. And bathe them frequently to help dissolve the natural, allergy-causing substances in their sweat and skin that spread to their fur.