> Arguably it's rational (though selfish) to think like this.

Is it? We are not talking about screwing the climate for the people who will come in 200 years, right? In the last decades we have been saying "if we don't change the trend, your children will most likely die because of the climate change".

Is it rational to be 30 and not care about the fact that we will be screwed long before we reach the age of retirement?