Biodiversity or Biological Diversity is commonly used to describe the number and variety of living organisms on the planet; the different plants, animals and micro-organisms, their genes and the ecosystems of which they are a part of. It is defined in terms of genes, species and ecosystems which are the outcome of over 3,000 million years of evolution. Species extinction is a natural part of the evolutionary process. Due to human activities however, species and ecosystems are more threatened today than ever before.
The human species depends on biological diversity for its own survival. The richer the diversity of life, the greater the opportunity for medical discoveries, economic development and adaptive responses to such new challenges as climate change. The variety of life is our insurance policy. Our own lives and livelihood depend on it.