How much extra investment to you think green tech companies get for pension funds excluding investment in this sector? They also only invest in publicly listed

How much extra investment to you think green tech companies get for pension funds excluding investment in this sector? They also only invest in publicly listed companies, not green startups. To me it seems like the exclusion is based on them viewing it immoral to invest in these companies.. I think the right way to go about this is to tax consumption of fossil fuels in countries where we can afford it and use the money to subsidize green tech/industry.