The coal formation process takes millions of years. The coal in use today started to form over 300 million years ago as living trees, ferns and other types of plant material. Coal is a nonrenewable resource because the time it requires for formation far exceeds the rate at which man uses it.Know More
The coal-forming process, known as coalification, involves physical and chemical changes of peat. Peat includes plant parts, decaying plants and the products of the decay process. In order to form peat, the rate of plant growth must exceed the rate at which bacteria can break down the materials, as occurs in the water of bogs and swamps, where bacterial action slows due to a lack of oxygen.
Coalification requires the burial of thick layers of peat. The pressure of the layers deposited above the peat begins to compress the plant materials and squeezes the water from them. Pressure, heat and time cause many changes in the materials, as is evidenced by the formation of methane gas. The process increases the carbon percentage of the coal. The quality of coal depends on when miners remove it from the ground during the coalification process. The longer the coal remains buried, the greater the carbon content. With enough time and pressure, the materials transform to graphite, a mineral containing only carbon.Learn More
Experts estimate that approximately 80,000 acres of the world's rainforests are destroyed per day, while another 80,000 acres are irrecoverably harmed each day. Experts also estimate that 135 species of various plants, animals and insects are lost per day, totaling 50,000 species per year, according to Scientific American.Full Answer >
Coal forms from the physical and chemical alteration of organic peat moss. This process, called coalification, takes hundreds of years to complete. During coalification, peat moss undergoes a series of transformations as a result of bacterial decay, compaction, variations in temperature and time.Full Answer >
Maize, otherwise known as corn, is important to the economy due to its wide range of uses. Maize is primarily used as feed for livestock, suggesting the dependence of the livestock industry on corn production. It is also used to create a variety of food and nonfood products, such as corn meal, sweeteners, corn oil, starch and ethanol, which is used as a cleaner-burning alternative to gasoline.Full Answer >
The ultimate source of energy is the sun. It sustains virtually every aspect of life on Earth. Other sources of energy, both renewable and nonrenewable, either directly or indirectly depend on the sun.Full Answer >