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• Because of energy needed for oil digging, transport and refining the efficiency of oil is only 8%.
• Boeing Spectrolab achieved 40% solar cell efficiency.
• Various solar energy experts expect solar energy to be cost-competitive with electricity from fossil fuels within 10 years.
• A solar installation with an efficiency of 10% with a surface of the size of France located in a place like the Sahara would be enough to cover the worlds energy needs.
• Of all used electricity in the United States over 9 percent of all electricity is used in incandescent bulbs. If all incandescent bulbs in the United States would be replaced by energy saving bulbs, the same amount of power would be saved as 80 coal centrals can produce.

Green Inventions is a site about renewable energy, for instance solar energy, wind energy, energy form water and bio energy, and energy saving developments, for instance more economical cars or more economical production processes. The site is wiki based, which means you can edit articles and add your own articles. The idea about this site is to bring all knowledge about renewable energy and energy saving together to one place. Scientists can exchange knowledge and anyone else can use it. Eventual this should lead to accelerate developments.

Wind turbines, near Winkel, Netherlands.

This site is set up from an idealistic point of view. The climate on earth is changing and our world leaders talk a lot but seem to be afraid of the economic consequences. Most of the electricity suppliers are not expected to change things because every alternative energy source make their profits go down. Our idea is that a technology revolution can solve the energy problems, but the solution will come from a home-made invention.

Aims of this site:

• To bring all knowledge about renewable energy and energy saving together.
• To provide scientists the availability to exchange knowledge.
• To join people together who care about the earth, in order to start new projects that will lead to innovations.
• Give innovative start-up companies a medium to promote their new invented products.
• Inform people about saving energy and new (green) energy developments.

People can add and freely change articles (for instance this page). When all people with knowledge about technology join and discuss, perhaps inventions can be made that will change the energy production.

So please don't hesitate, sign up, add your own articles and help to develop others.

• With a home bio-reactor electricity could be produces from kitchen and garden waste. Join our open source project home bio-reactor to help developing this machine.
• One of the most easiest things we can do to help saving the global environment is save energy. This article gives you a list of energy saving tips.
• California has prohibited bulb lights. What keeps the rest of the world waiting? Lets write a letter to our governments about this and all other things they could do to help renewable energy and energy saving developments.

Science fiction or no fiction in the nearby future?
Here is a list of some renewable energy ideas, of which inventing it would be a great breakthrough. Maybe this list brings scientists to take it for a challenge.

• The most efficient way of using sunlight can be found in nature. Plants convert sunlight into energy in such an efficient way current sun-power systems can't compete. This is done by photosynthesis. Main article: Imitate plants
• When energy is made from heat mostly steam is used to drive a generator. To make efficient use of wasted heat, it should be possible to make electricity from water with a temperature beneath 100°C. Main article: Produce electricity from low temp water

Solar panels and wind turbines, Broek op Langedijk, Netherlands.

Did you make a homemade renewable energy or energy saving invention and do you want to promote your invention? Or are you a young innovative company in renewable energy or energy saving inventions and looking for investors? Add an article with a good description of your product to Green Inventions and make clear your intentions.

Green Inventions is visited from all over the world and the number of visitors is rising quickly. With your article on this site you can reach many people who are interested in renewable energy inventions. Maybe your article is read by consumers or companies who are interested in using your product. Sign up now, editing a wiki is very easy!

Inventions looking for investors:

• Neo-Aerodynamic The Wind/Hydro Turbine of the future.

Concentrated Solar Power installation in Kramer Junction, California.

• Blue Energy

Wetsus, a research institute has found a way to generate electricity from bringing seawater and river water together.

• Battery Breakthrough

According to an article of Technology Review a Texas company claims to make a new ultra capacitor power system to replace the electrochemical batteries in everything from cars to laptops.