I doubt Trump considered any of these things. Trump considered the debts he owned campaign donors from the dirty energy industry. Just as he rewarded rich evangelicals by appointing a completely inept and unqualified DeVoss as head of Education Dept.

It's interesting you don't bother to calculate the costs of a rising ocean. If you think the cost of action is expensive, try inaction. The cost of Eroding beaches and saltwater intrusion will eclipse the cost of action. The DoD/Pentagon is so concerned that Trump has muzzled them and told them they can't talk about it, even if it's a major concern for our defense dept.