When considering the advantages of geothermal energy as a feasible power source and as an alternative way to generate electricity over fossil fuels or other conventional means there are a number of factors that need to be considered. Is it safe? Is efficient? What side effects does it pose to the environment or to people? Finally, is it a better alternative to other popular power sources such as wind turbines or solar energy?
The first and foremost question on people’s minds about safety is a valid and reasonable one. When nuclear power sources were first developed, most people thought there would be safe and clean energy sources that could provide unlimited energy to people around the world. The reality of this was realized in the Chernobyl incident, however, when radiation leaks caused severe damage throughout the USSR at that time and surrounding lands. Thermal energy on the other hand is an extremely safe source of electricity that can provide large amounts of power to people and relies upon no other fuels other than the Earth itself.
Because geothermal energy is generated by first drilling into the earth at a viable spot that could produce high amounts of heat and then pumping water into the drilled hole in order to generate superheated steam to turn turbines that generate power geothermal energy is both extremely safe and efficient as a source of power generation, much more so than conventional wind or solar generation sources. Geothermal can create high-energy yields and constant output over alternative methods that, aside from the occasional toxic gas pocket that is easily vented or the possible temporary cooling of a developed geothermal location, make it one of the safest, reliable and efficient sources of energy around the world.
Better still, as geothermal power uses the Earth’s own natural energy for power production and poses no real threat to the surrounding environment geothermal power plants have little to no side effects other than occasional gas discharges from the crust.
The only major downside of geothermal energy and what prevents it from becoming a primary energy source around the world is the locating and developing of feasible locations for geothermal power plants. While the most viable spots for thermal energy sources are near active volcanoes and fault lines for obvious reasons these locations are also the most unpredictable and therefore unsuitable for plant development. This is why alternative sources such as wind turbines and solar energy have become more popular around the world as they can easily be established and maintained on more locations than geothermal plants are capable of at this time.
One possible alternative to this is making a geothermal hybrid that could utilize alternative energy sources (in particular solar power, as it is also an effective source of thermal energy) to supplement geothermal based energy production in order to help boost geothermal energy production, however this poses some problems as well as this is not necessarily economically feasible to do this or prudent in most locations.
At this time as it stands the most feasible locations worldwide for geothermal plants are areas such as Iceland, New Zealand and other mountainous regions with high pockets of geothermal energy from either active or dormant volcanoes. Until more locations can be sourced or a better process can be developed to harness geothermal energy more effectively in other areas alternative energy sources may still dominate the market due to their current overall greater cost-effectiveness in the near future, but geothermal energy is still the best and most efficient choice if you can locate a suitable area to build a plant upon.