Climate change action demands moving to an energy system based on renewables and leaving fossil fuels in the ground. International investment agreements, and particularly ISDS, stand in the way of energy transition. They limit the ability of governments to set the terms of their energy policy, including the support of renewable energy. Investment agreements such as the Transatlantic Trade and Investment Partnership (TTIP) and the Comprehensive Economic and Trade Agreement (CETA) will further empower corporations to challenge strong government action on climate change