Additionally, the push to stop depending on fossil fuels makes the investment an even riskier endeavor because the refinery might be outdated by the time it starts making a profitable return. It would be like if the entire world was highly dependent on lemons, and a farmer planting a lot of lemon trees that take 2 - 5 years to grow when half the world is insisting on switching over to limes. If the lemons were being produced right now and all that has to be paid for is the regular maintenance of the lemon trees, it would be profitable. However, the farmer has to purchase the land and seeds, prepared the land, install and acquire appropriate farming equipment, hire an entire staff that are experts in lemons, and grow the trees before even receiving a single penny in revenue, all while a good portion of the population is anti-lemon because lemons are harmful to the environment (hypothetically speaking) and wants to switch over to limes. which are less damaging. Business-wise, this would be a terrible investment. It's not that it couldn't possibly turn a profit, but when you're an investor with considerable capital, you're going to invest that in ventures that are more likely to produce a profit. It would make no sense to risk your capital on such a risky venture when there are hundreds of others that are less risky.