According to the article, this isn’t even recapturing CO2. It’s grabbing plant/decomposable waste before it rots, turning it into these dense bricks, and burying it under ground. Like, collecting corn husks from farmers. This feels stupid to me and like a big gimmick.
Denver isn’t great with public transport either. There’s at least a minimal light rail system and buses go pretty much everywhere, so that’s the good part, but the city is so sprawled out that unless your destination is a direct route you’re looking at an hour or more to exclusively use public transport. And that’s really the main city. Start getting out into the expanded metro area and there’s not many choices except for a handful of spur rail or bus lines.
It’s a lot more than many American cities, especially on paper, but in practice it’s pretty rough to use as a primary transport.