All living things, including humans, are connected. Each species-no matter how small-has an important role to play. In this new program, we explore biodiversity and its importance to maintaining the balance of nature. Without biodiversity as a safety net, nature's survival would be at risk. Humans are by far the biggest cause of changes to biodiversity. How can we protect the biodiversity of the Earth? Terminology: biodiversity, genetic diversity, species diversity, ecosystem diversity, ecosystem, habitat.