News tagged with biomass
Related topics: biofuel , fossil fuels , greenhouse gas emissions , catalyst , microbes
Biomass, is a renewable energy source, biological material derived from living, or recently living organisms, such as wood, waste, and alcohol fuels. Biomass is commonly plant matter grown to generate electricity or produce heat. For example, forest residues (such as dead trees, branches and tree stumps), yard clippings and wood chips may be used as biofuel. However, biomass also includes plant or animal matter used for production of fibers or chemicals. Biomass may also include biodegradable wastes that can be burnt as fuel. It excludes organic material such as fossil fuel which has been transformed by geological processes into substances such as coal or petroleum.
Industrial biomass can be grown from numerous types of plant, including miscanthus, switchgrass, hemp, corn, poplar, willow, sorghum, sugarcane, and a variety of tree species, ranging from eucalyptus to oil palm (palm oil). The particular plant used is usually not important to the end products, but it does affect the processing of the raw material.
Although fossil fuels have their origin in ancient biomass, they are not considered biomass by the generally accepted definition because they contain carbon that has been "out" of the carbon cycle for a very long time. Their combustion therefore disturbs the carbon dioxide content in the atmosphere.
Plastics from biomass, like some recently developed to dissolve in seawater, are made the same way as petroleum-based plastics. These plastics are actually cheaper to manufacture and meet or exceed most performance standards, but they lack the same water resistance or longevity as conventional plastics.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
An estimated two billion people in the developing world heat and cook with a biomass fuel such as wood, but the practice exposes people especially women to large doses of small-particle air pollution, which ...
Health Jul 08, 2011 | not rated yet | 0 |
The exhaust from diesel-fuelled vehicles, wood fires and coal-driven power stations contains small particles of soot that flow out into the atmosphere. The soot is a scourge for the climate but also for human health. Now ...
Medical research Jun 27, 2012 | 5 / 5 (1) | 0
If the human race keeps growing fatter at American rates, the Earth may face a rise in food demand equal to that of nearly a billion extra people, British researchers warned on Monday.
Health Jun 18, 2012 | 5 / 5 (1) | 1
The world population is over seven billion and all of these people need feeding. However, the energy requirement of a species depends not only on numbers but on its average mass. New research published in BioMed Central's ...
Health Jun 17, 2012 | not rated yet | 0