15 Interesting facts about air

Air is the clear gas in which living things live and breathe.

Air is a mixture of about 78% of nitrogen, 21% of oxygen, 0.9% of argon, 0.04% of carbon dioxide, and very small amounts of other gases.

The third layer of air is called the mesosphere. This layer can be found over 52 kilometres (32 miles) above the earths’ surface. The upper part of the mesosphere is called the mesopause. Within the mesosphere, temperatures are decreasing once more. Mesosphere temperatures are around -90 °C (-130 °F).

Read more on the next page...