I think it's a little bit misleading to casually drop a "yearly budget" like this, as if this is something we're currently following. In the US the average car emits 4.6t of CO2 per year [1]. If you really think we need to be following this yearly budget the implications on our society (including basically a ban on most car trips being currently taken) are extremely drastic.

[1] https://www.epa.gov/greenvehicles/greenhouse-gas-emissions-t....