Bio means life and diversity means difference, so the biodiversity is the diversity of life on the earth. Life includes both plant and animals present on the earth, show immense functional and structural variations. Two plant and animals are not exactly alike. They not only differ in their external look or morphology and internal structure but also show variety of distribution,habits etc.

Biodiversity is the part of ecosystems. It forms the basis of sustainable development and environmental health of the planet and is the source of economic and ecological security for future generations. Thus the term biodiversity means, the variety and variability of life forms existing within the living world or a particular place of the earth. This concept was firstly described in 1980 by Edward Wilson.
Significance of biodiversity.
It helps to maintain the ecological balance necessary for survival of not only plants and animals but also humans on earth. The resources also provide raw materials for plants and animal breeding. It has greater importance in agriculture ,forestry and livestock. For human being ,it provides the assurance of food, raw materials such as wool or fiber for clothing ,materials for shelter etc.

There are generally three levels of biodiversity,
1.Genetic diversity
2.species diversity
3.Ecosystem diversity

The main aims of biodiversity means conservation of life,natural habitat and natural resources. It speaks in protection of forest and wildlife. If we save the biodiversity then we are far from environmental pollution and climate change. The global issues climate change and pollution are spread in the earth due to the undesirable manipulation of the biodiversity. So, we can protect our earth from biodiversity,Which is the free gift of nature. If we polluted the biodiversity,then the hazardous effect of natural disaster seen in our earth. Therefore, we must save our biodiversity. We must Remember that earth is the common house of the all plants and animals.

May 22nd is celebrated as world biodiversity day, which is celebrated in whole world with main slogan "if we protect our nature then the nature protects us."