At D+C/E+Z, we are proud of our international network of authors. It is particularly important to us to be a platform for voices from the global south. Some authors contribute on a regular basis, others don't. Here you can find information about the people behind the contributions.

Marian Rzepka

contributed to D+C/E+Z in summer 2015 as GIZ’s senior planning specialist for energy efficiency.  

All articles of Marian Rzepka

Energy-efficient buildings

China can save 40 % of its heating energy

In China, more and more houses are being made energy efficient – but 50 billion square metres of building area is a lot of ground to cover

Energy-efficient buildings

Learning from China

Knowledge and expertise relating to energy-efficient retrofitting can be applied to many countries if they scale back their energy subsidies

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Achieving the UN Sustainable Development Goals will require good governance – from the local to the global level.


The UN Sustainable Development Goals aim to transform economies in an environmentally sound manner, leaving no one behind.