The primary use of coal is as a source of energy. Nations around the world use coal to produce electricity. Steel manufacturers also use coal to create a fuel called coke. Coal is formed from plants that were buried in the earth millions of years ago.Know More
Coal is an important energy resource, but is not renewable. It is an exhaustible resource, which means that the supply is finite. Another significant problem with coal as a fuel is that it pollutes the atmosphere. Using coal produces large amounts of greenhouse gases. The fuel from coal is burned at power plants to heat water. The heated water creates steam that powers a large turbine. The turbine then produces electricity.
Experts divide coal into four main classifications. These are lignite, subbituminous, bituminous and anthracite. These four types of coal have various levels of energy content. Anthracite coal has the highest energy content and is therefore the most valuable of the four groups. Bituminous coal is the most common type of coal in the United States. Over half of the coal reserves in the country contain bituminous coal. Anthracite coal is much less common, with less that 2 percent of the coal reserves in the nation being of this variety.Learn more about Industries
The largest coal-mining companies in the United States, as of 2013, were the Peabody Energy Corporation, Arch Coal, Alpha Natural Resources and Cloud Peak Energy. Together they produce approximately half the coal mined in the United States each year.Full Answer >
BuyCoalOnline.com offers online ordering and free shipping of boxes and bags of bituminous coal and anthracite. CoalForSaleOnline.com sells and ships high-quality anthracite coal by the box, bag or ton. Some companies deliver coal by the truckload, including Wilson Coal and Supply in Sparta, New Jersey.Full Answer >
Standard Industrial Classification codes are used to identify specific types of businesses when they file with the Security and Exchange Commission. They also help to promote uniformity of statistical data collected and analyzed by governmental agencies and private organizations.Full Answer >
Alloys are used because they are often harder than pure metal. Making alloys usually involves mixing one harder element with a metal to create a stronger item.Full Answer >