Instead of a belief system that pictures an afterlife, judgment, and a system of belief or observance that passes muster, picture the world as it is and humans as they are. Substitute World for God. Living things require clean water and air, not to be faced with rapid extinction, and for the oceans and the air not to be heating up. They need to not have poisonous chemicals in their soil and food. On the right, many question whether these things are really happening, or whether they are happening to the extent claimed, and they point to the damage that such beliefs can cause (lost jobs, costs, inconvenience). On the left, many reply with facts that are simply not believed. Maybe those who are willing to gamble with our health, and with ecosystems, can apprehend a Best Bet argument.
If the left is correct, and the very life systems of this planet are indeed threatened, and failing to act is indeed harming us very substantially, acting means saving the world. If the right is correct, failing to act will prevent some irritating rises in price and having to make some adjustments in our lives, such as not being able to emit as much, or having to use products that don’t work quite the same as the ones to which we have become accustomed. On the one hand, world salvation: on the other, perhaps some small gain (and even this is disputed by those who point to the many benefits of greening economies).