Before you tie yourself up in knots comparing electronic air purifying systems, take a detour to your nearest garden centre and consider loading up on houseplants instead. A NASA study carried out in the 80s found that plants were a good way of improving air quality in space facilities. Earthbound mortals ran with this and began to explore the effects of plants on air quality indoors. Plants can increase positivity, creativity and serenity and bring happiness to your life. They can absorb harmful air pollutants such as formaldehyde released by new carpeting. They can help prevent allergies and strengthen the immune system. And as if all of that weren’t enough, they add colour and lustre to your home. Here’s our guide to air-purifying plants that will improve your wellbeing in return for a little TLC.