How exactly would we colonize Mars anyways? All equipment on Earth is run off fossil fuels: gasoline cars, diesel trucks, jet engines, helicopters, busses, etc

How exactly would we colonize Mars anyways? All equipment on Earth is run off fossil fuels: gasoline cars, diesel trucks, jet engines, helicopters, busses, etc. Tesla electric cars barely make a dent, and rely on electricity produced by natural gas. Solar intensity on Mars is much weaker than on Earth. I assume this would require huge acres of land to capture as much energy from the sun via solar panels, as compared to Earth. Fortunately Mars has electric dust storms that can scrub the solar panels for us, which would reduce the need to send human labor out to clean them. So that leaves hydrogen and nuclear. Hydrogen can be split via electrolysis, but this requires a lot of electricity. See problem #1. And it requires expensive fuel cells to convert it back into electricity, so that it can be used on demand. But we haven’t yet mastered the mass production of fuel cells here on Earth, in order to produce it cheaply enough. Fuel cells requires platinum, gold, and a bunch of other precious metals. So this would add to an already very expensive camping trip to Mars. It’s possible wind turbines might be used, but Mars has a thin atmosphere, which already presents problem for spacecraft trying to land. But this may work for wind turbines. Or geothermal, but his assumes the core of Mars is hot. But from all satellite reconnaissance so far, Mars doesn’t seem to have any hot springs. Then nuclear, this is likely the most viable technology. Possibly by RTG, which seems to be the most portable, as we can build that on Earth, and launch it to Mars. You would need to launch a lot of them from Earth to ship to Mars, which further reduces the affordability, and kills the possibility of living off the land. And if uranium exists on Mars, which I’m sure it does, then you’d need a huge industrial base just to mine and process it. But first, you’d have to find it, which would require expensive human and robotic exploration outside in Martian excursion suits. Fission based nuclear plants as we know it on Earth seems overly complex to use on Mars. It’s just a giant water boiler, used to produce steam, to spin a generator, to create electricity. And I doubt the technology as it is used on Earth, can function correctly in the cold winters of Mars. You’d have to prevent your radioactive water coolant from freezing on you. So you’d need to redesign it in order to be used safely on Mars. Fusion reactors, well, we still haven’t invented that yet, and they keep saying that it’s only 50 years away. So that brings us back to fossil fuels. If they’re correct in assuming that Mars used to be a tropical paradise, billions of years ago, and full of lush vegetation and flowing rivers, before it froze over, then, I’m certain that there is oil buried somewhere in the dirt. It may be frozen, but we can bring in our fracking technology to extract it. Or maybe it’s frozen in tar sands, in which case we can excavate it. So there you have it. Mars has oil! Possibly.. Now, it’s time to go plant a flag. Every man (or nation) for himself!