Why is biodiversity important?

Read the Articles below:

http://chge.med.harvard.edu/category/biodiversity-and-human-health

http://science.howstuffworks.com/life/evolution/mass-extinction1.htm

http://www.who.int/globalchange/ecosystems/biodiversity/en/

In a short paragraph address why biodiversity in important and what actions can be taken at a local, regional, and federal (government) level to protect or preserve biodiversity.

Remember to cite any additional sources you may have used.