There isn't public support for a carbon tax, since neither party has proposed it recently. If there isn't support for the most efficient way to reduce CO2 emiss

There isn't public support for a carbon tax, since neither party has proposed it recently. If there isn't support for the most efficient way to reduce CO2 emissions, don't go around pestering people with lots of restrictions, such as dietary ones, that would be far less efficient. They won't work politically once the restrictions begin to bite.