Some fun entrants:

Amsterdam’s Smart System of Underground Garbage Bins

Liquid-Filled Window Absorbs Heat During the Day, Releases It at Night
2021-11-05: A bit more on underground trash systems:

While the wave of waste tubes hasn’t materialized, Roosevelt Island’s experience gives us reason to believe that the concept is more than a pipe dream. After 45 years, the island’s waste system is still humming along. It breaks down only occasionally, when residents shove a toaster oven or a Christmas tree or some other oversized piece of trash down one of the cutes, according to chief engineer Al Digregorio. He says workers can usually clear those blockages out in a few hours.

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