At least some experimental level, scientists have been able to change co2 into an environmentally friendly fuel, which ends up in zero emissions when used.
Of course, like anything else, just because they can do it in the lab does not mean that it can be produced economically and become viable. It is interesting to see that the scientist are from China, which is suffering significantly from its pollution and is contributing a significant amount of co2.
http://www.sciencealert.com/new-mate...ted-efficiency