So according to author we should expect humans to change just now, in and instant, and make it last? It won't work, even I know that. But I do know that it changes and changes for the better.
My father told me that even now, after years of having this system, he still forgets about trash segregation and just dumps whatever to the closest bin. He tries, but even after over a decade it's not something that he acts upon as an instinct. On the other hand, I don't even recall "the time before sanctioned waste segregation". It took a generation, but it progressed. Same happened with other little commodities, like preserving water or choosing to use public transport instead of using a car to get everywhere.
I have my own hydroponic garden, to cut both cost of food and learn a bit of engineering because I was hearing about possible future food shortages and steeply rising prices. I'm probably only about a decade younger from many of you and it's already a change that would be hard for you guys to accommodate. It happens, but in slow increments and requires time before getting mainstream; not unlike concept of accumulation and strata in geology.
Climate is serious, but expecting 180 degree change instantly, or even calling for it in any way, is just… dumb? How many people you know who instead of slowly changing their life went all out, and switched from greasy pizza couch-potatoes into people watching their diets, physically active, learning languages etc? How many of them failed in less then a week? A month? Three months?
Future looks brighter than what it would seem, but expecting fast results is the problem of that type of evangelism.