Biofuels have been around as long as cars have.

A biofuel is a fuel that contains energy from geologically recent carbon fixation. These fuels are produced from living organisms.

Generating Electricity from Wing Waves.

Wind turbines, like windmills, are mounted on a tower to capture the most energy. At 100 feet (30 meters) or more aboveground, they can take advantage of the faster and less turbulent wind.

Producing electricity from solar energy.

Solar energy is a free, inexhaustible resource, yet harnessing it is a relatively new idea. The ability to use solar power for heat was the first discovery.

Turbines catch the wind's energy with their propeller-like blades.

A blade acts much like an airplane wing. When the wind blows, a pocket of low-pressure air forms on the downwind side of the blade.

Solar energy may have had great potential

Solar technology advanced to roughly its present design in 1908 when William J. Bailey of the Carnegie Steel Company invented a collector with an insulated box and copper coils.

We have been harnessing the wind's energy for hundreds of years.

For utility-scale sources of wind energy, a large number of wind turbines are usually built close together to form awind plant.

Biofuels are produced from living organisms.

In order to be considered a biofuel the fuel must contain over 80 percent renewable materials.

Geothermal energy is the heat from the Earth.

Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma.

Geothermal heat pumps can tap into this resource to heat and cool buildings.

A geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building.

In the future, civilization will be forced to research and develop alternative energy sources.

Possession of surplus energy is, of course, a requisite for any kind of civilization, for if man possesses merely the energy of his own muscles, he must expend all his strength - mental and physical - to obtain the bare necessities of life.

Showing posts with label rooftop pv system. Show all posts
Showing posts with label rooftop pv system. Show all posts

Monday, 30 November 2009

Obama Puts Science And Climate Change At America Heart

Obama Puts Science And Climate Change At America Heart
"It's about ensuring that facts and evidence are never twisted nor obscured by politics nor ideology."

With these words, Barack Obama has drawn a line under the faith-based, oil-industry-biased policies of his predecessor.

He has made the following highly significant appointments which are fantastic news for climate-change campaigners, and which mean the world can now begin to hope that America can lead the way to a speedy about-turn in fossil-fuel dependence, and make up for eight lost years of Bush Presidency:

* respected climatologist Jane Lubchenco is to head the National Oceanic and Atmospheric Administration
* Steven Chu, a Nobel prizewinner, is to be Secretary of the Department of Energy
* Harvard physicist John Holdren has been made director of the White House Office of Science and Technology Policy.

Steven Chu believes, rightly, that the best way to reduce greenhouse emissions is to waste less energy, by investing in energy efficiency.

He believes America can reduce its energy use without reducing its wealth, and has worked with the Helios Project, the research initiative Berkeley Lab launched for breakthrough renewable energy and efficiency technology - nanotech photovoltaics, microbial and cellulosic biofuels, and chemical photosynthesis. This despite the fact that his Nobel Prize was for his work in atomic physics.

In this video he explains his philosophy:


Holdren, an entrepreneur-supporting scientist who has worked with Paul Ehrlich and received the Nobel Peace Prize, knows about the new figures that show the rapid acceleration in the loss of Arctic sea ice, as well as dramatic acidification of the ocean.

Lubchenco (the first woman to hold the position of head of the National Oceanic and Atmospheric Administration) has said that even if the world abruptly shifts away from fossil fuels, the oceans will continue to soak up carbon dioxide and become more acidic. She recommends protecting marine life by reducing overfishing, cutting back on nutrient run-off and creating marine reserves to protect marine eco-systems.

Credit: alt-energy-solutions.blogspot.com