They have been relying primarily on fear and guilt tactics for almost thirty years now. And they don't work. We're all scared to death. But the tactics haven't worked. Intimidation doesn't work either.
Psychologists know that reality is dependent on our perception of it.
Therefore we must appeal to people compassionately and positively or they won't change. But the field of psychology has its own tragic flaw. It has remained exclusively focused on human beings and their relations with one another. The consequences of this anthropomorphism for psychology have been at the very least that it seems to have made itself irrelevant to the central question of our time, whether life itself will remain sustainable. Another consequence is that there is no model of mental health which includes the natural world.