More cards in this set

What living organisms are thought to have produced the oxygen in the atmosphere now and how?

Where did most of the carbon from the carbon dioxide in the atmosphere become locked in?

What do the oceans act as for carbon dioxide and what does increased levels of carbon dioxide do?

What, nowadays, increases the level of carbon dioxide in the atmosphere?

What does a high % of carbon dioxide cause?

What is 'air' and how could it be filtered?