Biosphere 2 is an Earth system science research facility located in Oracle, Arizona. It consists of a sealed, self-sustaining environment designed to replicate various ecosystems found on Earth. The facility includes different biomes such as rainforest, savannah, desert, and ocean, as well as living quarters for research scientists. Biosphere 2 was originally built in the 1990s as a social experiment to study the interactions between humans, plants, and the environment in a closed system. It has since been used for various research projects related to climate change, ecology, and sustainability. Researchers at Biosphere 2 study how different ecosystems respond to changes in climate, biodiversity, and nutrient cycles. Overall, Biosphere 2 provides a unique opportunity to study and better understand the complex interactions between humans and the environment within a controlled setting.