 e breathe in and out 20,000 times each day, drawing 12,000 litres (more than 3,000 gallons) of air into our lungs to obtain the oxygen we need to survive. However, we don't always spend a large part of our time in the fresh forest air. On the contrary, we spend 90% of our time indoors where the air is at its worst.
There are up to 20 million particles in a cubic meter of room air. This level is twenty times greater than that found in the air at a busy road junction, and up to two hundred thousand times greater than at the seaside. To make matters even worse, the heat built-up throughout our hot humid day encourages mould, virus, germs, and bacteria growth inside our homes causing health problems. |
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