Azotobacter chroococcum is widely used as a biofertilizer for crops, this helps in reducing environmental pollution by decreasing the reliance on chemical nitrogen fertilizers. The bacterium produces auxins which simulate plant growth. A.chroococcum is also a probiotic. A. chroococcum can assist in cleaning up oil spills and detoxifying heavy metals in contaminated soils. Its ability to produce melanin helps protect its nitrogenase system from oxygen, facilitating survival in polluted environments.