These are not waste of time. We are past the point where just lowering emissions would be enough. I think people don't understand how climate change works. On

These are not waste of time. We are past the point where just lowering emissions would be enough. I think people don't understand how climate change works. On a human significant time scale, every gram of CO2 you emit mostly just stay there. A small part disolves in the oceans but that's it. The rest will forever contribute to the Earth greenhouse effect. The goal which was set in the Paris agreement is reaching net zero. We are aiming to entirely stop emitting GHC. Everything which is emitting today needs to stop or be offset. I repeat: everything. That obviously includes transports, an area which moreover is fairly easy to clean especially for a country as rich as the USA.