PT150 · S2 · Q7 Geothermal power plants produce power

This piles on another reason why we would want there to be more geothermal power, but even if geothermal was equivalent when it came to pollution, we'd already be sufficiently motivated to want more of it, since geothermal is cheaper to produce. So while this increases the incentives for getting more and more geothermal plants up and running, it doesn't seem to address the constraint — which is that there seem to only be limited areas of the world where these underground hot pools can be reached by a drill. A potential red-flag here is that this answer is already true. We're looking for something that will be changing so that "in the near future" we'll go from having geothermal in "limited areas of the world" to having it "available in most areas".

It wouldn't really matter to us even if a typical geothermal plant produced less energy. We'd still want to build more of them, since the energy is cheaper. Think about wind farms. I'm sure a typical wind power plant produces less energy than a typical coal-burning plant does, but since the wind power is cheaper and cleaner, we're still willing to build them (we might need 2000 wind farms to make the same energy as 1500 coal-burning power plants, but so what? If it's cheaper, we'll do it.) This does say something positive about geothermal (it's makes at least as much power as a conventional plant), but just like (A), we don't really need to pile on more positives. The fact that it's cheaper power is reason enough for us to want more geothermal plants. It sounds like we just don't have many areas of the world where our drills can currently reach these underground pools. A potential red-flag here is that this answer is already true. We're looking for something that will be changing so that "in the near future" we'll go from having geothermal in "limited areas of the world" to having it "available in most areas".

This is a negative about geothermal plants that would potentially keep them from being constructed. We want an answer that shows us something is changing that will allow us to make many more of them in many more areas.

This is weak language "it could lead to significantly lower costs", so compared to the correct answer it has less impact. And since it would cut costs for nearly all types of power plants, it would probably make conventional power plants cheaper, so it may be providing a reason why people would continue building conventional plants, as opposed to geothermal plants.