Too many Greens are not just ignorant of science, they hate science.
Environmentalists refuse to countenance any argument which undermines their sacred cow.
This was because many environmentalists couldn't make the transition from confrontation to consensus, and could not get out of adversarial politics. This particularly applies to political activists who were using environmental rhetoric to cover up agendas that had more to do with class warfare and anti-corporatism than they did with the actual science of the environment. Basically, people don't like science, and I suspect Prince Charles is like that. He needs to be very careful. These groups are politically motivated and care nothing for science or human advancement.