Is carbon dioxide friend or foe?

Answer 1

Friend. It helps our breathing.

Well it's actually both friend and foe. like a lot of things too much of something is bad.

It makes up circa 60% of the Earths atmosphere which we breathe. Without it diluting the oxygen in the air we would not survive and everything would be highly combustable.

But equally CO2 emmisions causes the earth to trap heat and warm it up. this leads to global warming which can radically change the weather patterns fo the Earth. This is bad for planet Earth and eventually for us.

Answer 2

Carbon dioxide plays a necessary role in trapping heat and keeping the Earth warm enough to support life. However, the excessive amounts of carbon dioxide emitted by human activities are contributing to global climate change and resulting in negative impacts on the environment, making it a foe when present in excessive levels.