One way of making a dent in atmospheric CO2 levels is to capture the CO2 produced in thermal electricity generating plant and pump it down oil/gas wells or to the bottom of the ocean.
A feasible method of capture is to burn the fuel in the presence of oxygen (not air) and a diluent, either...
I'd be grateful for a link to information (e.g. highway Dept. design rules) about recommmended minimum distance along a freeway from an on-ramp to the next off-ramp.
