This past few years saw rising interest expressed for renewable energy—the kind of energy that is abundant and free, being taken from natural resources like sunlight, water, rain, geothermal heat, wind, and tides. Because of concern over dwindling fuel supply and the increasing problem of global warming, numerous governments and organizations from all over the [...]

Anaerobic digestion is a series of processes in which microorganisms break down biodegradable material in the absence of oxygen. It is widely used to treat wastewater sludges and organic waste because it provides volume and mass reduction of the input material. As part of an integrated waste management system, anaerobic digestion can also reduce the [...]

This article focuses on planning and installing a residential home wind power generation system, not as much on how a wind energy system works. Wind power generation, an alternative and renewable energy source, has seen a dramatic increase in the last few years. Technological advances make it more and more feasible to install wind power [...]

Solar electricity has a bright future: It is renewable and available in unlimited quantities, and it does not produce any gases detrimental to the climate. Its only drawback right now is the price: the electric power currently being produced by solar cells in northern Europe must be subsidised if it is to compete against the [...]

As soaring oil prices and greenhouse gas emissions fuel the search for cheaper and cleaner sources of energy, a Japanese aerospace manufacturer may have found the right stuff for a solution. It’s a windmill you can call your very own. Yokohama-based aerospace manufacturer, Nippi Corporation, has developed a revolutionary 20 kW wind turbine power generation [...]

Geothermal energy falls under the category of renewable energy source because the water is replenished by rainfall and the heat is continuously produced inside the earth. Geothermal energy is derived from heat within the earth. People can use the steam and hot water created inside the earth to heat buildings or produce electricity. Wondering what [...]

Biomass power is the largest source of renewable energy as well as a vital part of the waste management infrastructure. An increasing global awareness about environmental issues is acting as the driving force behind the use of alternative and renewable sources of energy. A greater emphasis is being laid on the promotion of bioenergy in [...]

The word geothermal comes from the Greek words geo (earth) and therme (heat). So, is a renewable resource originating deep within the Earth where temperatures can reach up to 6000°C. At a depth of five kilometres from the Earth’s surface, the temperature decreases to around 200°C. We can use the steam and hot water produced [...]

Wave power is the term used to describe the harnessing of the energy contained in the ocean’s surface waves, and converting that energy into a useful form – usually electricity generation. Wave energy is essentially stored, concentrated wind energy, the waves being created by the progressive transfer of energy from the wind as it blows [...]