Are any of these "green power" options like Hydroelectric power, Geothermal energy, Tidal power, Wave Power, Solar, Wind, and Biomass energy being used today?

Yes, all of these green power options are being used today to generate electricity and provide sustainable energy sources. Hydroelectric power is one of the oldest and most widely used forms of renewable energy, while geothermal energy, tidal power, wave power, solar, wind, and biomass energy are increasingly being used as well. These forms of green power help reduce the reliance on fossil fuels and contribute to a cleaner and more sustainable energy future.