Can I get your opinion about geothermal energy, renewable energy sources like wind and solar energies?
The topic is too wide to make a summary in this box. I would like to suggest to look into the following papers and books on the subject already in the market:
1. The current situation and the perspectives of the energy sector in the European region, International Journal of Energy, Environment, and Economics; Vol. 16 Issue 2/3, 2008.
2. The Current and Future Role of Renewable Energy Sources for the Production of Electricity in Latin America and the Caribbean; IJEEE (2012) ISSN: 1054-853X, Volume 20, Number 5, Nova Science Publishers, Inc., 2012.
3. Energy in Latin American and the Caribbean: The Current and Future Role of Renewables and Nuclear Energy Sources in the Regional Electricity Generation; ISBN: 978-1-62257-980-8; Nova Science Publisher Inc.; 2013.
4. The Future Role of Renewable Energy Sources for The Generation of Electricity in the European Region; Journal of Reviews on Global Economics, 2014, Vol. 3 1-6; Lifescience Global; pages 1-14; 2014.
a good and quick comparison between the numbers of geothermal energy and other renewable energy sources is found in this link. Out of all the ``green```energy, hydro energy is the major contributor in terms of power production, accounting for 16 percent of global electricity generation – 3,427 terawatt-hours of electricity production in 2010, and is expected to increase about 3.1% each year for the next 25 years (check http://www.worldwatch.org/node/9527).
I suggest you read the Renewables 2012 Global Status Report that I have attached below.
The topic is too wide to make a summary in this box. I would like to suggest to look into the following papers and books on the subject already in the market:
1. The current situation and the perspectives of the energy sector in the European region, International Journal of Energy, Environment, and Economics; Vol. 16 Issue 2/3, 2008.
2. The Current and Future Role of Renewable Energy Sources for the Production of Electricity in Latin America and the Caribbean; IJEEE (2012) ISSN: 1054-853X, Volume 20, Number 5, Nova Science Publishers, Inc., 2012.
3. Energy in Latin American and the Caribbean: The Current and Future Role of Renewables and Nuclear Energy Sources in the Regional Electricity Generation; ISBN: 978-1-62257-980-8; Nova Science Publisher Inc.; 2013.
4. The Future Role of Renewable Energy Sources for The Generation of Electricity in the European Region; Journal of Reviews on Global Economics, 2014, Vol. 3 1-6; Lifescience Global; pages 1-14; 2014.
It is an important issue.
Renewable resources represent an increasingly important alternative for obtaining energy supplies. Some sources, such as solar and wind power, have achieved technical and economic maturity. Others still need to be developed.
However, we must keep in mind that it will be necessary to master the nuclear fusion energy to ensure energy supplies to all consumers.
Wind and solar energy are the future of electricity production since the fossil fuel is expected to be consumed fully within 40 years.
There are several reviews on geothermal energy, solar and wind. However, you have to specify whether it will be use for electricity or heat/cooling (for the case of geothermal energy and solar). Now if the focus is electricity, then you have to consider that geothermal energy has certain advantages as it is not an intermittent resource. Wind and solar have lower emissions during operation but then you need either to have storage or have the possibility to cover the fluctuations by other means.
Geothermal energy for electricity generation has also as drawback that it is only located is specific areas and it is not so widespread as solar or wind.
When it comes to heat then it depends on the application, temperature range, etc. Geothermal heat pumps are quite widespread in Europe (specially northern Europe). Then solar collectors are widely used worldwide.
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