Today it is hard to sell huge real estate property without a certificate of an advantageous environmental audit and energy balance. The German Government has agreed to hard commitments to reduce environmentally unfriendly greenhouse gases and yet further plans of the European Union. Thus, the value of conventional buildings is affected, because they are still ahead of traffic when it comes to pollution.

To discuss this issue representatives of different departments (political, economical and scientific) met in a think tank called ENRESO 2020 initiated by RWE Energy AG, a subsidiary of German electric power and natural gas public utility company RWE AG. The meeting was held in Frankfurt. The acronym ENRESO stands for Energy Real Estate Economy Society. For the first time there was a presentation of criteria for an environmental certification which has to meet international standards.

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