Reminds me of one of my favorite colony buildings in Master of Orion 2:
"Core Waste Dumps take man-made toxic and polluting agents and stash them deep within the planet. Since they’re so far below surface water supplies and often destroyed by the intense pressures and temperatures at the fringe of the molten core, this completely eliminates all Pollution on the planet." https://masteroforion.gamepedia.com/Core_waste_dump
What a game! I used to make massive spherical space-ships with annihilation beams and the computer would make about 300 small ship fleets. The turn-based combat meant my 5 ships would kill 5 ships with my huge death beams, then all 295 of their small ships would fire each of their 3 dinky peashooters, then 885 shots later, I'd destroy 5 more, then 90 of their ships... Fast forward to today, and I'm setting my data analyses to run for 2 hours and walking away just like I did back then with battles.
"Core Waste Dumps take man-made toxic and polluting agents and stash them deep within the planet. Since they’re so far below surface water supplies and often destroyed by the intense pressures and temperatures at the fringe of the molten core, this completely eliminates all Pollution on the planet." https://masteroforion.gamepedia.com/Core_waste_dump