In two thousand and 15 the administration adopted what they called the clean power plan. The plan was challenged in court, like these plans often are. So i was put on wholt, didn't go into effect. Then in two thousand and 19 the trump administration saidw have another plan. But that plan was also put on hold after it had its own legal challenges. And then the byden administration asked the federal appeals court not to reinstate the trump rolls after the court challenge. Despite all this, the supreme court decided to review the case.