Which types of fuel are addressed by the Maine Fuel Code?

The Maine Fuel Code is designed to address safety, installation, and operation standards for various fuel types utilized in heating and energy production. The correct choice encompasses natural gas, propane, and other gaseous fuels, reflecting the comprehensive scope of the code.

Natural gas and propane are commonly used for residential and commercial heating, cooking, and other applications, making their regulation a priority for safety and efficiency. The inclusion of other gaseous fuels indicates the code's adaptability to various energy sources and technologies that may be employed in the state.

In contrast, the options focusing solely on propane, wood, coal, or electric and solar energy do not capture the full range of fuels that the Maine Fuel Code seeks to regulate. For instance, while wood and coal might be relevant for certain applications, they do not fall under the primary scope of the fuel code, which emphasizes gaseous fuels for their widespread use and safety implications. Therefore, the comprehensive nature of the correct answer reflects the code's intent to provide appropriate guidelines for all relevant gaseous fuel types utilized within Maine.