that regulation won't happen though

if a politician says that from next month on flights, gas and meat will be taxed according to the environmental impact then I'm pretty sure that politician won't be in office anymore that next month.

For sure we need those kinds of regulations since most people won't lift a finger if it's inconvenient for them - but if noone is showing the politicians that they have support with ideas like this it's far too risky for them to do and they will just pass the "bomb" to the next government and hope that it goes off when they are in power.

In Germany Merkel for 16 years completely slept on housing (specifically the heating) being a main factor for environmental impact of the whole country and now the current government has to kind of hit the brakes hard and named a deadline after which it's impossible to install new gas-heating anymore and the backlash was HARD. Would this have been tackled earlier the impact would have been far less but it's just too risky for politicians to even try something like this if they want to stay in power.

That's why I think that something like a Citizens' assembly it probably the only way possible to implement something before it's too late. As long as there are politicians hoping to be reelected noone will even try - and if there aren't assemblies then starting a movement of individual change is the only chance we got