rot-grün in English: red-green, of a coalition between the SPD (a large social democratic party in Germany) and Bündnis 90/Die Grünen (the largest environmental party in Germany)

Meanings

Germanred-green, of a coalition between the SPD (a large social democratic party in Germany) and Bündnis 90/Die Grünen (the largest environmental party in Germany)
Das rot-grüne Gesetz sieht vor, dass bis 2022 alle Atomkraftwerke vom Netz gehen.The "red-green" law provides that all nuclear power pants are taken off the grid until 2022.