Affordable, accessible and safe public transport is a fundamental solution to dramatically reduce emissions. However, the crucial link between renewables and public transport has been largely ignored. By powering public transport with renewable energy, countries and municipalities can make serious contributions to address climate change, while improving local air quality and public health. Many solutions exist to shift public transport to rely on renewable energy and are in many cases ready to be implemented. Each city must create a plan that is adapted to the local resources, governance and market conditions. This brief proposes actions and solutions that can accelerate the path to achieve net zero and carbon neutral goals through the connection between renewable energy and public transport.