What Does Carbon Dioxide Do?
Like what are the effects?
Generally, carbon dioxide is the air that people breathe out and can lead to death. This can happen if a person is left in a room with limited oxygen supply. You can get more information on this at http://en.wikipedia.org/wiki/Carbon_dioxide#Uses.
carbon dioxide is what people breathe out. It doesn't really do anything but I know that if you're stuck in a sealed space with limited oxygen breathing it in for long periods of time can kill you.
It allows plants to breath. They take in carbon dioxide in the process of photosynthesis.