Those who say that the solution to the climate/ nature crisis isnt radical, probably has an misunderstanding of what the word actually means. It doesnt mean bad or being fanatic. In fact it is latin for root. To think of a system from its roots instead of its branches.
Being radical or reformist requires us to look at a system and judge whether it is doomed to collapse or can be fixed. If it cant be fixed, one needs to become a radical.