You need to stop thinking in terms of absolute “
solutions”. There is a cost and benefit to everything we do. There is no “solution”, there are costs and benefits.
Moreover, we are already being more efficient. If it were not for mass immigration, the population of the UK (and much of Europe BTW) would be declining naturally. Our fertility rates have been below 2.1 for decades (since the 1970s, I believe).
Now, the population of the UK (a high carbon per capita country) is almost 70m, it would probably be closer to 50m if it were not for mass immigration. We need to control migration and let the population decline naturally. With a smaller population there will be fewer emissions.
Countries like China are also peaking in population and will start declining soon. As will India. Fertility rates are dropping all over the world and eventually, the population of the planet will
naturally level off and start declining. All without infringing on anyone’s rights.
What I suggest, is do our best to keep our countries clean, safe from crime, well-educated, pleasant places to raise families and live in peace.
Let the population naturally drop to a manageable level and when this happens, CO2 emissions
should follow suit. We have to let go of this idea that we have to panic and “somebody do something!!!!”, “Ban ALL cows!!”, “Ban ALL transport!!!”.
You will probably end up causing much more harm than good.