LEED AP Building Design and Construction (BD+C) Practice Exam

Which biofuel system is NOT eligible for renewable energy production?

1. Combustion of forestry biomass waste

2. Combustion of municipal solid waste

3. Biofuels from agricultural waste

4. Use of untreated wood

The correct answer is: Combustion of municipal solid waste

The combustion of municipal solid waste is typically not considered a renewable energy production method eligible for LEED certification. This is primarily because municipal solid waste can include a wide range of materials, such as plastics, metals, and other non-biodegradable materials that, when burned, can release harmful pollutants into the atmosphere. In contrast, the other biofuel systems mentioned in the options all utilize organic, biodegradable materials that can regenerate over time and have a lower environmental impact when utilized in energy generation. For instance, the combustion of forestry biomass waste and biofuels from agricultural waste are considered sustainable practices because they make use of materials that are abundant and would otherwise contribute to waste. Untreated wood may also come from sustainable forestry practices. Thus, the reason municipal solid waste does not qualify is tied to its heterogeneous nature and potential environmental concerns, distinguishing it from the other biofuels that are recognized for their renewable characteristics.