Bothersome tobacco smoke 
Tobacco smoke is known to contain highly toxic agents such as benzene, carbon monoxide, formaldehyde, ammonia or benzopyrene. These substances are not only inhaled when smoking, but are expelled into the air as smoke.

When there are smokers in the house it is important to constantly ventilate the room in which cigarettes are lit, because of the air is not renewed the concentration of toxic agents will increase as we expel carbon dioxide when breathing.

Chimneys and heaters
In some homes located in cold areas (above all country houses) wood or coal chimneys
are used in winter. The chimney is usually located in one room of the house, and
it is very important to prevent the gases expelled from contaminating the air. Two of the elements emitted by these heat sources are nitrogen dioxide, carbon dioxide
and nitric oxide.

One trick for preventing the smoke emitted by a log fire from spreading to the room is to place a large bowl of water in the centre of the fire. The water will gradually absorb
all the smoke.

Plants: a perfect solution
In addition to improving the look of a room, plants are the best natural air purifiers around. Rubber plants or rhododendrons are highly recommended for the entrance, living room or small connecting rooms as they efficiently absorb smoke and toxic agents that come from tobacco, especially formaldehyde.

Cacti, meanwhile, have been shown to be able to attract the radiation produced by electric devices such as TVs and computers, thus preventing headaches and eye problems.

The bathroom is also an ideal spot for plants to show their worth. The best plants for preventing damp are bracken and calabash.