Is the concentration of carbon dioxide increasing or decreasing? Explain.

It's currently increasing! We are using and burning fossil fuels, and when burned they release carbon dioxide and other chemicals that can be harmful for us. Lots of carbon dioxide contributes to the green house effect, which makes warmer winters and hotter summers. It's up to us to decide the future of our planet. Have a nice day! :)

Increasing because of all of the gasses us humans have made over the last couple decades and centriures. can not spell lol