Healthy ecosystems clean our water, purify our air, maintain our soil, regulate the climate, recycle nutrients and provide us with food. ... Biodiversity is the key indicator of the health of an ecosystem. A wide variety of species will cope better with threats than a limited number of them in large populations.
The crab nebula consists of an oval-shaped mas of the filaments and they are imprints of the progenitor star that surrounds the diffused blue region and is helium-rich, other than gold other elements like the iron, oxygen and the uranium are produced.
