The accounting value of an equity, especially a growth stage company, is never the same as its economic value. When in history has accounting (like a price) measured something real / believable about the environment?
One way to look at this is what is the environmental impact of Tesla? Amazon would have love to have invested in Tesla. That would have made this fund. Anyone would. But just because their accounting values goes up so and so, doesn't mean that's a measurement of their environmental impact.
My point is, equities are ill suited incentives for even economic profits, let alone environmental "profits."