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On the other hand, waste-to-energy industry leaders do not understand the current waste condition in Brazil. In order to provide specific solutions to problems in Brazil, the Waste to Energy Research Technology Counsel in Brazil is developing a hybrid municipal solid waste (MSW)/natural gas cycle. This system burns a small amount of natural gas ...
The Great Oxidation Event (GOE) or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis or Oxygen Holocaust, [2] was a time interval during the Earth's Paleoproterozoic era when the Earth's atmosphere and shallow seas first experienced a rise in the concentration of free oxygen. [3]
Water is the medium of the oceans, the medium which carries all the substances and elements involved in the marine biogeochemical cycles. Water as found in nature almost always includes dissolved substances, so water has been described as the "universal solvent" for its ability to dissolve so many substances.
Encouraging various ocean layers to mix can move nutrients and dissolved gases around. [147] Mixing may be achieved by placing large vertical pipes in the oceans to pump nutrient rich water to the surface, triggering blooms of algae, which store carbon when they grow and export [clarification needed] carbon when they die.
There was concern that an unresolved water crisis may impact the 2016 Olympic Games. [18] In 2017, the rains remained extremely irregular in Minas Gerais, [19] Espírito Santo [20] and most parts of the regions Central-West and Northeast. This is the worst drought in Brazil in the last 100 years, according to the O Estado de S. Paulo in ...
In the ocean by volume, the most abundant gases dissolved in seawater are carbon dioxide (including bicarbonate and carbonate ions, 14 mL/L on average), nitrogen (9 mL/L), and oxygen (5 mL/L) at equilibrium at 24 °C (75 °F) [124] [125] [126] All gases are more soluble – more easily dissolved – in colder water than in warmer water. For ...
CaCO 3 is supersatured in the great majority of ocean surface waters and undersaturated at depth, [10] meaning the shells are more likely to dissolve as they sink to ocean depths. CaCO 3 can also be dissolved through metabolic dissolution (i.e. can be used as food and excreted) and thus deep ocean sediments have very little calcium carbonate. [16]
The Mariana dam disaster, also known as the Bento Rodrigues or Samarco dam disaster, occurred on 5 November 2015, when the Fundão tailings dam at the Germano iron ore mine of the Samarco Mariana Mining Complex near Mariana, Minas Gerais, Brazil, suffered a catastrophic failure, resulting in flooding that devastated the downstream villages of Bento Rodrigues and Paracatu de Baixo (40 km (25 mi ...