And yet changes to UK environmental policy have actually helped bring the UK's carbon emissions down to 19th century levels (yes, caveats about where our stuff is made nowadays apply) and companies with more money than all citizen environmentalist groups put together plough far more money into efficiency savings and renewables than disinformation campaigns.

There's a plausible argument that this isn't enough, but it's difficult to see how an unpopular activist group with little to say on actual solutions to climate change is likely to improve upon this status quo, especially since they actively ruled out engaging with supportive businesses because ultimately the aesthetics of grassroots protest appealed more to them than the opportunity to press for tangible emissions reduction.

The success of the UK's energy policy is undeniable. However they still have a long way to go in every other sector (transport, agriculture, imports..) before reaching carbon neutrality.

The practical solutions are well known in the community, see the Drawdown project for a pretty exhaustive list. Since we are very late in the fight against climate change, all of these solutions need to be implemented, so there's no point in promoting just a few of them.

For now, they prefer to focus on raising awareness and get citizens to demand change urgently. The next step will be to ask for a citizen's assembly (https://rebellion.earth/act-now/resources/citizens-assembly).

This argument of "enough" is depends on doling quantums of responsibility along national borders. I think in policical decisionmaking on national level it's a necessary evil but not really helpful in thinking about legitimacy individual actions.