The BIGGEST problem with clean energy

physics girl, you did not mention Geothermal energy which is the biggest energy storage on planet. our visitors use Geothermal energy for number of reasons. two main one is to control global temperature for extending life bearing period of their planet. and it is available globally in all part of planet 24/7.  it is used for most energy need as well as community heating/cooling etc.
Ferydoon Shirazi. MG1