Broadly speaking, I think there are two kinds of companies you want to look for:

* Those which directly aim to reduce or sequester emissions

* Those which could deploy technologies to lower their emissions and save money

You can find examples of these in literally every sector. This is a blessing because it means there is a ton of demand. It's also a curse since it can be hard to pick a niche if you don't happen to have some kind of specialization (e.g. transportation or agriculture).

I'm actively looking for clients that fit both of those categories. I'd be happy to chat about collaborating or any of this if you reach out via email (see profile).