Germany just switched on a solar installation the size of a city. One farm, 1.5 million homes, zero carbon. The Cottbus Solar Park covers 3,500 hectares of former open-cast coal mining land in Brandenburg. The location was chosen intentionally. Decades of heavy mining left the terrain completely flat and agriculturally useless, meaning zero land conflict for a massive solar rollout. Now, it holds 4.2 million bifacial solar panels generating 2,200 megawatts of power. The farm produces 2.1 terawatt-hours annually, entirely replacing the output of two coal plants that operated on this exact same dirt until 2022. A dedicated massive transmission line runs the power 140 kilometers straight into Berlin's grid. Germany isn't stopping here. Their coal-to-solar conversion program targets 47 former mining sites by 2030, taking land that was completely dead and turning it into a 28-gigawatt clean energy machine.