alt Hacker NewsThat's a straw man argument.
Voluntarily opting out of a high-CO2 lifestyle will do exactly nothing. Demanding that anyone recognizing the threat of climate change and demanding a different approach "first change their lifestyles" or using their lifestyles as an indicator of commitment is ludicrous. This is a global systemic issue that cannot be fixed by individual action. Game theory tells you why.
Besides that; all the nice and shiny things you mention - the busses and trains and the cement - can be produced and operated at fraction of their current CO2 cost. Wind mills and PV panels offset their CO2 cost by magnitudes if they are replacing fossil fuel industries.
There's a middle ground between "lets burn it all to the ground" and "let's go back to the savanna".
> This is a global systemic issue that cannot be fixed by individual action. Game theory tells you why.
Nothing will change (and nothing has fundamentally changed since the climate scaremongering started), because people in the West do not want to change their lifestyles, and people elsewhere aspire to a Western lifestyle. There is nothing you can do about this. I am not not going to eat less meat or drive my car less than I find convenient to please some leftist eco-warrior.