backfire is not a real thing, it's a lie used by people who were never going to change their minds to shame you out of doing things that actually work
Climate - truthful information about climate, related activism and politics.
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
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Interesting review, many references. Well-targeted protests can help to keep policymakers motivated, especially prior to critical moments like decisions before COPs (during the last days, it's too late). But what about the effectiveness for the protestors themselves? - directing a lot of energy to such actions might distract youth from focus on developing an 'expert' career to help climate more substantially (am thinking from own past experience...).
I don't think I've seen a longitudinal study like that, but what I've seen in practice is that teenagers who start off leading local protests end up becoming activists who engage with municipal and provincial/state government on an ongoing basis.