Considering the hazardous effects of car and other vehicle exhaust when released into the atmosphere, I began wondering why we are not dominantly preventing the exhaust from entering into the atmosphere, for example by liquidizing it and storing it either in the driving vehicle or elsewhere?
My question is: why is it so difficult to liquidize the exhaust, in order to prevent it from entering the atmosphere? Or isn't it difficult at all perhaps?
Please note that it is not forbidden to theorize about adding any equipment and or chemical reactants to the vehicle.
P.S.: I would be equally interested in just storing the exhaust of a vehicle inside the vehicle by means of compression, rather than liquidization.