In Part I the author says, "While I’ve stopped eating meat and gone off the grid in an effort to reduce carbon emissions, I can’t give up my Toyota Tacoma. And, apparently, I’m not alone."

It won't be easy.  Like quitting tobacco...   Or, having a living room without cable tv...  Or, a farm without slaves...    Society/economy/culture can change.  Humans did alright before everyone owned a motorized vehicle.   
Do we want the future with hours every day spent inside the car?  Or the one where Hawaii leads the world towards a happier healthier existence?