Restoring historic buildings and saving energy at the same time is now a reality. Passive house window expert Franz Freundorfer developed the heat-saver for the Waaghaus in Bolzano, a building from the 13th century .

A well-accepted measure for climate protection involves reducing greenhouse gas emissions . And buildings have the greatest energy saving potential, according to the official EU Energy Efficiency Plan 2011 .

Historical buildings and town quarters are an integral part of the European cultural heritage. However, such buildings are often not very energy efficient and thus contribute substantially to the emission of greenhouse gases.

The construction of a building does not only start with its design by architects and engineers.

The overall building stock represents about 40% of the EU’s energy consumption. It also produces about 36% of its total CO2 emissions. Besides, new buildings only account for 1% to 1.

Ulrich Filippi Oberegger is a senior researcher in the energy management in buildings group of the Institute for Renewable Energy of EURAC Research . He tells youris.

The research into molten carbonate fuel cells has it origins as early as the 1930s, Emil Baur and H.Preis in Switzerland experimented with high-temperature, solid oxide electrolytes.

Totaling 11.1 megawatts over 30 hectares, the development represents one of the largest solar power developments in the region. Construction on the plants will start this month and is expected to be completed by the end of the year.

Some laboratories have achieved impressive efficiencies under concentrated sunlight. SunPower Corp. is much closer to the market. The California-based company recently produced a record-setting 24.

Engineer and project manager Michael Blunk, Fraunhofer Institute for Wind Energy and Energy System Technology IWES, is one of the experts in the European project UpWind. The aim is to develop a new type of turbine.

Competitive solar cells rely on climate, efficiency, material and production costs. The fluctuation of electricity prices from different sources and political climates both play a big part as well.

90% of the world’s population lives less than 2,700 km from a desert. If less than 1% of the world’s deserts were used to concentrate solar power, enough electricity could be produced to supply the entire planet.

Geothermal energy has always been used by man, but it wasn’t until the late 19th century that geothermal energy was “rediscovered” and used on an industrial scale.

Ecostiler “Energy efficient Community Stimulation by use and Integration of Local Energy Resources” is aiming to develop energy efficient communities thanks to the use of locally produced biogas and district heating systems.

In the district of Hol, located west of Oslo, a church built in 1920 was renovated to become energy efficient for as little cost as possible, while respecting its status as a historical monument.

In the spring of 2004, construction began on what is probably the most revolutionary project Högsåra in Finland has ever seen. This initiated a very special type of island adventure.

Certain European cities are a step ahead when it comes to preserving the environment. For instance, thanks to innovative techniques and a more ecological way of life, the commune of Växjö, Sweden, could be on its way to becoming the first fossil fuel free city in the world.

Reducing the energy requirements of buildings is an absolute priority in Europe. The energy demonstration project SARA has developed several public-access eco-buildings in France, Italy, Slovenia, Spain, UK and Uzbekistan.

Climate change is on everyone’s lips these days and the European Union, having decided to reduce its CO2-emmissions by at least half by 2050, is no exception.

Our future depends on energy, and as households and cars currently contribute to more than 50% of all energy consumption in the EU, new energy-efficient architecture can be an important approach to bring this percentage down.