The difference between these is that stopping smoking and losing weight make your life overall better. Reducing carbon emissions will make life worse for everyone who's already on the lower rungs of humanity. No realistic amount of resource redistribution is going to work here.
It's also not enough. We will have to start sucking up that carbon from the atmosphere whether we cut emissions or not.
It's also not enough. We will have to start sucking up that carbon from the atmosphere whether we cut emissions or not.