Taiwan has significant coal deposits and some insignificant petroleum and natural gas deposits. Electrical power generation is nearly 55% coal-based, 18% nuclear power, 17% natural gas, 5% oil, and 5% from renewable energy sources. Nearly all oil and gas for transportation and power needs must be imported, making Taiwan particularly sensitive to fluctuations in energy prices. Because of this, Taiwan's Executive Yuan is pushing for 10% of energy generation to come from renewable energy by 2010, double from the current figure of approximately 5%. In fact, several wind farms built by American and German companies have come online or will in the near future. Taiwan is rich in wind energy resources, with wind farms both onshore and offshore, though limited land area favors offshore wind resources. Solar energy is also a potential resource to some extent. By promoting renewable energy, Taiwan's government hopes to also aid the nascent renewable energy manufacturing industry, and develop it into an export market.