Planet & Climate - 37 free documentaries about renewable energy & solutions.
Start with Turning a $150 AC Into a Super-Efficient Geothermal Unit! (58 min, Tech Ingredients), then Global renewables: Pioneering the energy transition (42 min, DW Documentary). All 37 documentaries here are free to watch from their makers' official uploads. To read deeper, the top-rated book on renewable energy & solutions is How to Avoid a Climate Disaster by Bill Gates.