What are some Indie Hacker solutions for the climate that fascinate you?

So my team and I have a publication where we are trying to figure out how entrepreneurs can drive positive outcomes for the environment.

Generally we're writing about companies that deal with hard tech or lab-to-market tech. Examples include Solshare from Bangladesh and Apeel in the US, both of which are venture funded.

The only Indie Hacker-esque company that we have found (and which I REALLY respect) is IFIXIT in the US.

Was wondering if anyone knows of others in the same vein that are Indie Hackers, but also impactful.