Interesting fact - most plants release oxygen during the day, snake plants release oxygen at night when the temperature cools due to its unique CAM photosynthesis. 

'Snake plants are known for their air purifying abilities and nothing makes for a better night's sleep than having fresh air around you,' says Lively Root's product operations specialist, Matt Slaymaker

'Not only does the snake plant claim a spot on NASA’s list of the top 10 air-purifying plants, it is also one of few houseplants that converts CO2 into O2 at night, which is something most house plants only do during the day,' says Paris Lalicata, plant expert at The Sill. 

Nature is known to promote relaxation, so bringing some foliage inside will help to create a peaceful indoor oasis. Peace Lilies are loved for their air-purifying properties and subtle beauty, peace lilies are thought to harmonize energy and boost feelings of optimism. 

On a practical level, they are scientifically proven (by NASA) to remove toxins, such as Benzene and Trichloroethylene, found in paint, varnish, adhesives and synthetic fibers.   

'This low-maintenance plant, which is native to the South African tropics, helps to humidify the air and promote better airflow, helping you breathe better and sleep easier too,' says Alfred. 

'It also produces a calming fragrance which, like the lavender plant, can help promote relaxation. This easy-to-care-for plant thrives in indirect light and shade.'

Pothos photosynthesises in the usual way, so it doesn't have any nocturnal oxygen-boosting properties like some on this list. However, pothos grow easily and swiftly, so with a couple of these in your room could feel like a soothing tropical oasis.

'The easy-care pothos plant and its quick growing vines will make any space look more lush,' says Paris Lalicata. 'Under the right conditions, the plant can grow long trailing vines that will take over your space-feeling like you’ve been transported out into nature. When we feel closer to nature, we reduce mental fatigue and stress, and increase relaxation which can help us sleep.'