Another example of sustainable development initiative
occurs in Freiburg, Germany. The large use of solar energy by using solar
panels at the roofs of the buildings has created the concept of 'energy plus' -
that means the building produces more
energy than its use. Freiburg has a good weather and the amount of sunlight
during the year is helpful for the energy production.
The negative point is the price - the houses have a
relative high-cost initial investment and the residents expect that only after
10 years the exceeding investment will be converted in profit - once they sell
the exceeding energy.
Source: ein haus fur die zukunft das plusenergiehaus, accessed 08 April
2014, <http://plusenergiehaus.de>
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