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WHAT IS AIR |
Air is a precious resource that most of us take for granted. Air supplies us with oxygen, which is essential for our bodies to live. Without it, we would die within minutes. Pure air is a mixture of several gases that are invisible and odourless. It consists of about 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide, and other gases — as well as varying amounts of water vapour. |