Biodiversity refers to the variety of life on Earth, including the number of plant and animal species, the genetic diversity within them, and the different ecosystems they inhabit. The major threats to biodiversity are the destruction and fragmentation of habitats, pollution, introduction of exotic species, and overexploitation. These can be addressed by protecting natural areas, preventing invasive species, educating people, slowing climate change, and promoting sustainable practices in areas like agriculture, fishing, urban planning, and policymaking. Conservation of biodiversity is important for ecosystem functioning and provides many services that humanity depends on.