Final answer:
Rotting biomass emits methane, and burning biomass generates carbon monoxide and carbon dioxide. Methane from decomposing organic waste can be captured for energy, while burning biomass can produce both sustainable energy and pollution.
Step-by-step explanation:
Rotting biomass emits methane due to anaerobic decomposition or fermentation processes that occur when biomass decomposes in the absence of oxygen. This process is utilized by anaerobic bacteria that can convert organic waste materials such as municipal sewage, livestock manure, and garbage into methane gas. Methane is a potent greenhouse gas but can be captured and used to generate electricity or heat, contributing to more sustainable energy practices.
Burning biomass generates carbon monoxide, carbon dioxide (CO2), and particulate matter. The combustion of organic materials such as wood, manure, and other plant-based materials releases these gases into the atmosphere. While burning biomass can sometimes be a more sustainable option than fossil fuels, especially if it uses waste materials, it can also contribute to air pollution and deforestation if not managed properly.