Partially, the air we breathe in is actually 78% nitrogen, 21% oxygen, and 1% other. We breathe out about 18% oxygen, 78% nitrogen, 3%carbon dioxide and water vapor. It depends on how specific you want to be. People generally say that we breathe in oxygen and breathe out carbon dioxide though.
yes,in a word! we breathe in oxygen plus other gases & particles, we exhale carbon dioxide plus other gases & particles, that plants and other organisms breathe in use and exhale oxygen, it's all a circle of life that is needed to exist!
it is wrong to say we breathe in oxygen and breathe out carbon dioxide because the sir we breathe in has a mixture of different gases and also what we breathe out. we don't only breathe in oxygen and breathe out carbon dioxide there are other gases in the atmosphere around us.