Sustainability and climate are not products or businesses in themselves.

If you're trying to sell sustainabiity, what is your business? What are you selling? If it's advice on how people can be sustainable, or carbon credits or something, sure, those are things that may be tarpits.

But electric vehicles were probably a tarpit idea until they went from being advanced golf carts to being real cars.

Environmentally friendly packaging is doing very well. Etc etc.