If we continue promoting industries that cause the global climate to worsen more rapidly, we're going to pay a MUCH bigger price down the line.
Taking jobs from folks who work in such an industry is a price worth paying, considering the alternative.
The options are not fire them or keep screwing the planet. There's a third option: fire them but don't HANG THEM OUT TO DRY. Provide a social safety net - retraining, early retirement, health care, etc. This is the whole idea behind the "green new deal"... catch the people who would otherwise be ground up by the transition away from fossil fuels.
America has an education problem, and we need more people taking microeconomics in high school.
I don't think that's worked out very well so far. America is polarized on economic lines, and as long as some people's interests are unaligned with the environment / global needs, then this will continue.
The way you actually remove these jobs for good is to change the incentives for these workers so that they benefit from the new order.
This is why I think elements of the Green New Deal are a good idea: because it says that these folks have an even better future with green jobs than the present.