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.
Which statement best explains how the elimination of ice-covered ecosystems affects the rise or fall in global temperature? Eutrophication is often caused by excess limiting nutrient runoff from agricultural fields into aquatic ecosystems. This results in massive algal blooms, which eventually die and decompose, ultimately depleting the dissolved oxygen and killing large numbers of fish and other aquatic organism.