SESSION 1 – Wednesday, 16 February 2022 – 15.00 to 17.00 (CET)

Following the Paris climate agreement from 2015, to achieve the 1.5 degree goal all countries have to develop their building stock towards climate neutrality. In four steps with similar impact under different conditions they can reduce the CO2 emissions through building construction and use, compared to todays´:

-to under 50% through more energy efficiency of building envelope, building services and technical appliances (low carbon);
-to under 25% through renewable energy generation and use on site (zero carbon – buildings in use);
-to under 12,5% through material efficient and largely carbon free (new) construction (zero carbon – life cycle);
-to zero through more renewable energy generation than use (zero carbon – energy plus).

Because of manifold interactions between all components the reduction of energy consumption comes first, the reduced energy demand is then possible to be covered renewable on site and finally embodied carbon has to be respected as well to achieve a really climate-neutral building, by compensation through some extra renewable energy.

Even in China everyone is talking about climate-neutrality. The German Energy Agency is improving their certification standards for international projects from energy efficiency towards zero carbon. In the presentation we will give insights how to further develop local building stocks to a more sustainable standard.

SESSION 2 – Wednesday, 9 March 2022 – 15.00 to 17.00 (CET)


A world in which finite resources circulate in infinite cycles; where all products are healthy for people and the environment, and water flows out of factories cleaner than it flows in; with buildings constructed with healthy interiors and which generate more energy than they consume; and with farms that produce healthy food while their farmland becomes more fertile every year.
This future is possible with Cradle to Cradle. In his presentation, Tim Janßen introduces the holistic C2C approach to environmental, climate and resource protection.
He explains why our society needs to move away from linear economies, why Cradle to Cradle is based on a positive view of humanity, and how products need to be designed to be suitable for technological and biological cycles. He will show how products have to be designed in order to be suitable for the technological and biological cycles and give an insight to several best-practice examples from the construction sector. In addition, Janßen introduces the
Cradle to Cradle NGO that he/she co-founded, goes into detail about its educational and networking work.

SESSION 3 – Wednesday, 27 April 2022 – 15.00 to 17.00 (CET)

Ecological evaluation of different new building scenarios for the “Postsiedlung” – considering CO2 emissions and cumulative energy input
Global warming is urging action in every sector of society. The building sector in particular is forced to act, as it accounts for around 50% of annual greenhouse gas emissions worldwide. There is also increasing pressure for housing associations to address sustainability-related issues and future-proof properties, as buildings have extremely long life cycles compared to other products.
Research to date on different building options at the neighborhood level is scarce. The presentation shows how solid construction and wood construction variants of different building standards differ in terms of CO2 emissions and cumulative energy demand when keeping the building geometry fixated. For this purpose, a neighborhood in Darmstadt, Germany, was investigated, different time horizons were considered and scenarios of a suitable energy system were integrated.