Geothermal Energy

Geo energy has many advantages, is almost perpetual, is more predictable than wind and solar, it works 24 hours a day 7 days a week, the problem is that not everywhere are geothermal banks and in most cases the water needs to be purified from harmful chemicals and can contaminate the atmosphere with sulfur, I am convinced the energy future will be a combination of many technologies working together.

That's correct geothermal although free still some limitation because is significant source of air and water pollutant, but if properly handled its good option for some regions where other energy resources scarce.