Clothes washed with laundry products containing liquid laundry additive could purify air.

Hence vegetables purify air in the day time only.

A CELSS will use plants to purify air, clean water, and generate food for a human habitat.

The only thing that goes into it is purified air and water.

Well-lit, dry, warm rooms, smoothly humming machines for purifying air and water, hydroponic hothouses .

The birds began to sing with a clarity as sweet as that of the purified air.

Among the findings, he reported that moist air absorbs 13 times more heat than dry, purified air.

Going to a bar, lying down in the dark and inhaling purified air is a little less conventional.

We have now to devise a means of testing the action of such spontaneously purified air upon putrescible infusions.

While yelling he swallows great draughts of lung-expanding, purifying air and forgets the fear of "taking cold."

The following are our top 6 indoor plants that are easy to maintain and are extremely effective in purifying air.

The purified air of the Permian world favoured the reptiles' being lung-breathers, but the cold would check their expansion for a time.

It seesawed lazily down through the mechanically purified air and landed on the tile, half in the table's shadow and half out.

The company will now focus on other uses of activated carbon, such as purifying air, water and food, spokeswoman Vanessa Craigie said in an email.