As an expert in the field of renewable energy, I am well-versed in the various sources of energy production around the world. Geothermal energy, which is derived from the natural heat of the Earth, is a significant but not the most dominant source of the world's energy mix. To provide an accurate percentage of the world's energy that comes from geothermal sources, we must consider the total energy production and the share that geothermal contributes to it.

Geothermal energy is harnessed by tapping into the Earth's internal heat. This heat is in the form of steam or hot water, which can be brought to the surface and used to generate electricity. The technology for geothermal power generation is well-established, and it offers a reliable and continuous source of energy, unlike wind or solar power, which can be intermittent.

However, the global contribution of geothermal energy to the total energy supply is relatively small. According to the International Energy Agency (IEA) and various renewable energy reports, geothermal energy accounts for a small percentage of the world's total electricity generation. As of the latest available data, geothermal energy contributes less than 1% of the global electricity supply.

The Philippines, as mentioned, is a notable example of a country that heavily relies on geothermal energy. It generates approximately 23 percent of its electricity from geothermal sources, making it a significant player in the geothermal energy sector. The United States is the largest producer of geothermal energy, followed by the Philippines.

It's important to note that the utilization of geothermal energy varies greatly from country to country. Factors such as geological conditions, technological advancements, and government policies can significantly influence the development and deployment of geothermal energy projects. Some countries with volcanic activity or tectonic plate boundaries, like Iceland and Indonesia, are particularly well-suited for geothermal energy production due to the high temperatures and availability of geothermal resources.

Despite its benefits, there are also challenges associated with geothermal energy. These include the initial high costs of exploration and development, environmental concerns related to land use and potential emissions, and the need for specialized technology and expertise.

In conclusion, while geothermal energy is a valuable and reliable source of renewable energy, it currently represents a small fraction of the world's total energy production. Efforts to increase its share, such as those by the Philippines to expand its geothermal capacity, are commendable and can contribute to a more sustainable and diverse energy mix.

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The Philippines, which generates 23 percent of its electricity from geothermal energy, is the world's second biggest producer behind the United States. The Philippines aims to increase its installed geothermal capacity by 2013 by more than 60 percent, to 3,130 megawatts.Aug 14, 2008read more >>