Which of the following is NOT a renewable energy source that contributes to LEED credits?

Natural gas is not considered a renewable energy source, which is why it does not contribute to LEED credits focused on renewable energy. Renewable energy sources are those that are replenished naturally and can be utilized without depleting their availability.

Geothermal energy, solar energy, and wind energy are all classified as renewable resources because they harness natural processes that occur continuously in the environment. Geothermal energy utilizes heat from the Earth's interior, solar energy captures sunlight, and wind energy harnesses air movement. These sources are sustainable and have a lower environmental impact, making them eligible for LEED credits aimed at promoting the use of renewable energy in building projects.

In contrast, natural gas is a fossil fuel derived from the remains of ancient organisms. While it can be cleaner burning than other fossil fuels like coal or oil, it is still finite and contributes to greenhouse gas emissions when burned. Therefore, it does not align with the LEED framework's emphasis on sustainability and renewable energy use.