Manure from animals can help crops grow, but it can also harm the environment by releasing nutrients and carbon. Different ways of managing manure can either reduce or increase pollution. By studying various technologies, researchers found that digesting manure with waste can produce bio-energy and lessen environmental impact. Separating liquid manure into solid and liquid parts can be harmful, but combining separation with anaerobic digestion of solids can help. Keeping pig urine and feces separate in housing can reduce climate change and pollution. Overall, new strategies for managing manure can be more environmentally friendly and effective.