The topic area of mining and materials covers the extraction and use of substances for human purposes and the related impacts and consequences, such as pollution. It includes mining and resource extraction practices and impacts in all locations, including off-shore and into water bodies and the atmosphere. It includes materials in all forms from elemental (overlapping with chemistry) to manufactured products and side- or waste-materials. It includes industrial processes, material and waste management. It includes practices and policies related to mining and materials, including drivers like consumption patterns and resource economics.
Limestone is a sedimentary rock whose chief mineral component is calcite (calcium carbonate: CaCO3). Limestone can be formed by precipitation of calcite...
Fossil fuelLast Updated on 2014-10-28 12:02:28
Fossil fuel is any naturally occurring carbon compound found in the Earth's crust that has been produced by anaerobic conditions and high pressures acting on dead organisms. These fossil fuel deposits are typically found at depths beneath the Earth surface or ocean floor of tens of meters to kilometers, and often occur in large agglomerations of gas, liquid or solid matter. Presently, combustion of fossil fuels account for over 86 percent of the world's artificial energy delivered to the human society. These fuels are considered non-renweable in that their natural creation time requires millions of years.
The extraction, processing and combustion of fossil fuels causes significant adverse environmental consequences to biodiversity, air quality and water quality, as well as substantial impacts to human health and mortality. These processes also generate large... More »
Malaysia Natural ResourcesLast Updated on 2014-06-11 16:41:01The natural resources of Malaysia include water resources, energy, fisheries, forests, air resources, agriculture and minerals. An outline of these topics is presented below linked to articles within the Encyclopedia of Earth:
Malaysia- FAO Information System on Water and Agriculture
Malaysia Water Resources and Freshwater Ecosystems Factsheet
Water Profile of Malaysia
Malaysia Summary Factsheet
Energy profile of Malaysia
South China Sea
Malaysia - Forests, Grasslands, and Drylands Factsheet
Forests of Borneo
Borneo peat swamp forests
Borneo lowland rainforests
Borneo montane rainforests
Sundaland heath forests
Sunda Shelf mangroves
Peninsular Malaysia peat swamp forests
Peninsular Malaysia montane rainforests
Peninsular Malaysia lowland rainforests
Climate of Malaysia
Malaysia- FAO Information System on Water and... More »
Biochar: Concept to Sequester CarbonLast Updated on 2014-06-11 15:45:52
Biochar is a charcoal produced under high temperatures using crop residues, animal manure, or any type of organic waste material. Depending on the feedstock, biochar may look similar to potting soil or to a charred substance. The combined production and use of biochar is considered a carbon-negative process, meaning that it removes carbon from the atmosphere.
Biochar has multiple potential environmental benefits, foremost the potential to sequester carbon in the soil for hundreds to thousands of years at an estimate. Studies suggest that crop yields can increase as a result of applying biochar as a soil amendment. Some contend that biochar has value as an immediate climate change mitigation strategy. Scientific experiments suggest that greenhouse gas emissions are reduced significantly with biochar application to crop fields.
Obstacles that may stall rapid adoption of biochar... More »
UraniumLast Updated on 2013-12-15 23:42:25Uranium is a radioactive element that occurs naturally in low concentrations (a few parts per million) in soil, rock, and surface and groundwater. It is the heaviest naturally occurring element, with an atomic number of 92. Uranium in its pure form is a silver-colored heavy metal that is nearly twice as dense as lead and is pyrophoric when finely divided.
Uranium exhibits three crystallographic modifications as follows: alpha --(688°C)→ beta --(776°C)→ gamma. It is a little softer than steel, and is attacked by cold water in a finely divided state. It is malleable, ductile, and slightly paramagnetic. In air, the metal becomes coated with a layer of oxide. Acids dissolve the metal, but it is unaffected by alkalis.
Previous Element: Protactinium
Next Element:... More »
AntarcticaLast Updated on 2013-10-03 22:02:28
The continent of Antarctica is located almost entirely south of the Antarctic Circle, (66.5 degrees south Latitude). Only the tip of the Antarctic Peninsula and the fringes of Wilkes Land protrude north of that line.
Roughly centered on the geographic South Pole (coordinates: 90° 00' S, 0° 00' E.), it's total area of Antarctica is 14 million sq km (it's ice-free land area is 280,000 sq km while about 13.72 million sq km is ice-covered).
It is the fifth largest continent, following Asia, Africa, North America, and South America, containing 8.9% of the Earth's land area; and it is larger than Australia and the subcontinent of Europe. It is slightly less than 1.5 times the size of the United States.
The antarctic coastline measures about 17,968 km. All of Antarctica utilizes New Zealand Time.
Speculation over the existence of an "unknown... More »
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