[vixen99]

No need to rebrand. Simply stop using the vacuous phrase 'climate change' (Thomas Sowell has commented to the effect that you won't find a single rational person on Earth who denies that the climate changes) and replace it with actual referenced data (temperature, sea level, state of the poles etc.,) together with a non-cherry-picked historical context so that anyone can see for themselves what is actually happening climate-wise.

Resonance & rebranding would hardly be needed to alert the public if an asteroid was found to be on a trajectory for earth.