Denitrification is a crucial process in the nitrogen cycle, where nitrogen compounds in the soil are converted into nitrogen gas (N2) by microorganisms. This process helps to reduce excess nitrates in the environment, which can lead to problems like water pollution and algal blooms. During denitrification, bacteria such as Pseudomonas and Bacillus utilize nitrates as an energy source, releasing nitrogen gas back into the atmosphere. This natural process is essential for maintaining the balance of nitrogen in ecosystems and supports soil health by preventing the accumulation of harmful nitrogen compounds.