I know there are some, but not sure about "plenty".

Check out the latest YC cohort: I counted less than 10 startups interested in sustainable business out of 170+

https://techcrunch.com/2019/03/18/here-are-the-85-startups-t...

https://techcrunch.com/2019/03/19/here-are-the-88-companies-...

The rest not even aknowledge the fact that we are in a climate crisis.

I was surprised to see YC support startups involved in animal farming, guns, and even fossil fuel!!

We spend so much time in front of our screens that we have no idea of what's happening outside our little boxes :/

https://bigthink.com/videos/tech-billionaires-could-end-clim...