Biodiversity

1. Preserving local biodiversity effects the world because it may be one of the few places that have an endangered or soon-to-be endangered species.
2. The destruction of a habitat can kill the the animals that live there or cause them to move to another habitat and occupy another species' niche, which in turn can devastate the latter animal, and the "Cycle of Death" continues forever.
3. Preserving biodiversity can benefit human economics and medicine. Many of the spices that are main exports were discovered on accident when plants use them as modes of self-defense. The future of medicines may also depend on the biodiversity of our world. Already, we use asprin, an analgesic that was derived from chemicals that originated from biotic defensive reactions.