Green energy is energy that uses natural resources with very little pollution. Examples of green energy include anaerobic digestion, geothermal and wind power, hydropower, solar energy and tidal power. [Read more...]
Green energy
April 7, 2011 By
Renewable energy technologies
March 24, 2011 By
Renewable energy technologies are important for sustainable energy because they contribute to world energy security. This reduces our dependence on fossil fuels. The International Energy Agency states that:“Conceptually, one can define three generations of renewable technologies, reaching back more than 100 years”.
First-generation technologies emerged from the industrial revolution at the end of the 19th century and also include hydropower, biomass combustion, and geothermal power and heat. Some of these technologies are still used even today.Second-generation technologies include solar heating and cooling and wind power. Up to date forms of bioenergy and solar photovoltaic are now entering the mainstream prompted by research, development and demonstration in the 1980s. This initial research arose out of the environmental concerns due to the oil crises of 1973 and 1979.
Third-generation technologies are still under development and include advanced “biomass gasification”, “bio refinery” methods and concentrating on “solar thermal power”, “hot dry rock geothermal energy” and wave and tidal power.First- and second-generation technologies are now established but third-generation technologies are still heavily dependent on long term research and development commitments involving the public sector.
Renewable and Sustainable Energy
March 22, 2011 By
Sustainable energy is using energy that can meet the demands of the present day without denying the future generation their energy needs. Sustainable energy can also be regarded as renewable. Natural resources such as plant matter, solar power, wind power, wave and tidal power can also be classed as sustainable energy. It also includes technologies that can improve energy efficiency, such as nuclear power. However this is controversial because of concerns regarding a natural disaster and/or accidents such as Chernobyl or that it could be targeted by terrorist groups. [Read more...]
Environmental Friendly Construction, Aspects to Consider – Solar Power
February 28, 2011 By
It is a clean and renewable source of energy but it is still heavy and expensive to implement. As technology evolves, alternative components have made solar powered panels more affordable but they are still expensive and that limits its uses. Developing countries would be favoured with solar power usage but it is still a long way until it is affordable. [Read more...]
Environmental Friendly Construction, Aspects to Consider – Electrics and Electronics
February 24, 2011 By
Civilization is soaring with new inventions and gadgets, most of them relying in electricity to work.Washing machines, dryers, fridges, bulbs and lamps, televisions and radios, cameras and computers, mobiles and game sets are all responsible for a huge electric consumption all over the word. [Read more...]
Environmental Friendly Construction, Aspects to Consider – Water
February 20, 2011 By
The planet Earth is like a porous sponge and water is absorbed as well as springs from the ground. Many people are oblivious to the fact that what is thrown on the floor or thrown in the water will find its way to the groundwater. Groundwater reaches rivers and the sea and all pollutants that come with it mixes in the water that will be used for human consumption and also used in irrigation, bringing these pollutants direct into the food chain. As the water passes through the ground, pollutants are also left mixed with the soil. [Read more...]
