For the history of modern humans, see History of the world. For the history of life on Earth, see Evolutionary history of life. The history of Earth concerns the development of the planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of the Earth's past. The age of Earth is approximately one-third of the age of the universe.
Eutrophication is one of the main problems caused by an overuse of fertilizers and an excess of manure and sewage. These wastes enter the ecosystem and generally leach away from residential, business, and agricultural sites. The first part of eutrophication is the hyper-acceleration of aquatic life growth.
Sodium triphosphate, once a component of many detergents, was a major contributor to eutrophication. 1. Excess nutrients are applied to the soil. 2. Some nutrients leach into the soil where they can remain for years.