How carbon dioxide decreased
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The big picture

The big picture

Flow chart showing carbon dioxide moving from the early atmosphere into oceans, limestone and fossil fuels

Earth's early atmosphere probably contained lots of carbon dioxide, water vapour and nitrogen, with little or no oxygen. Over geological time, carbon dioxide fell to a tiny fraction of the air, about 0.04% today.

How carbon dioxide decreased Lesson

  1. GCSE
  2. /Chemistry
  3. /How carbon dioxide decreased