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

Our Contributors


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