I'm going to write a space opera, a part of it involves Mars. I wonder about the plausibility level of my following imaginations. "She descanded on the space elevator. The landscape outside looked like a mushroom field. There were transparent and red ones. The hats of the former ones were big lenses, that focused light to the trunks, that sucked in CO2. Inside the trunks, two different kind of microorganism bred. One produced oxygen, the other methane. The gases were gathered on the top, and pumped to the red mushroom like farm buildings for heating. During night, insulation and the rest of the gases kept the water inside the trunks fluid. The farm buildings had flat roofs covered by thick layer of martian sand for rad protection. People lived at the middle, green houses lit by mirrors and animal holding pens were at the rim. The point was that even if the fusion power plant of the city had failed, the agriculture could still survive." I wondered whether theese things could be a more efficient alternative to solar panels, or demand less rare materials? "The city was like to a really tall forest, the low gravity of Mars enabled architecture that was almost unimaginable on Earth. The spires of the city had a relatively small area at the basement, there were large squares, parks, wide roads between them. But above the lead-glass covered streets, the spires started to expand into wide verdures, connected by closed bridges."