A seed bank (also seedbank or seeds bank) stores seeds as a source for planting in case seed reserves elsewhere are destroyed. It is a type of gene bank. The seeds stored may be food crops, or those of rare species to protect biodiversity. The reasons for storing seeds may be varied. In case of food crops, many useful plants, that were developed over centuries are now no longer used for commercial agricultural production and are becoming rare. Storing seeds also guards against catastrophic events like natural disasters, outbreaks of disease, or war. 

The Amazon rainforest is world?s largest tropical rainforest and is also known as Amazon Jungle or Amazonia. It is known as ?lungs of planet? because it harbors probably millions of species.