Ecosystem regeneration is the restoration of an ecosystem and/or its components to recover from damage inflicted by humans or environmental disasters. Restoring an ecosystem might refer to the microbial population, the animals higher up on the food chain, or the restoration of habitat (for any of an ecosystem's inhabitants). The UN defines environmental regeneration as preventing, halting, and reversing the loss of nature. SPUN's goal in terms of ecosystem regeneration is defending biodiversity, which will help mitigating climate change among other benefits.