Yes. Trees are so important because they turn Carbon Dioxide from the atmosphere into Oxygen which we need to stay alive. So, the more trees that are cut down, the more Carbon Dioxide will stay in the atmosphere.

so we could have oxygen and so that our carbon dioxide dont fill up the atmosphere

Plants use carbon dioxide, so there is less carbon dioxide in the atmosphere in the summer.

Carbon dioxide. The increase of carbon dioxide is the cause of global warming.

That is carbon dioxide. It is a raw material