I agree 2.5% is significant! My argument is that shipping usage doesn't appear sensitive to price signals (based on the data we see from changes in prices). T

I agree 2.5% is significant! My argument is that shipping usage doesn't appear sensitive to price signals (based on the data we see from changes in prices). This means that regulation is probably a better approach to reducing emissions here. This is what was done for cars and is shown to work there.