January 26 marks the International Day for Clean Energy, an initiative aimed at raising awareness and mobilizing action for an inclusive transition from fossil fuels, such as coal, oil, and natural gas, to power generation systems with lower greenhouse gas emissions and fewer pollutants. The term "clean" signals a fundamental shift away from extractive, finite, and exhaustible energy sources toward systems based on renewable resources or on capturing energy embedded in natural processes. In a world grappling with climate change, clean energy plays an important role in reducing emissions and expanding access to reliable power. However, being labeled "clean" does not exempt these systems from the impacts associated with their production, deployment, and commercialization. In this context, architectural knowledge related to space, materiality, and habitation becomes relevant for supporting a transition toward energy systems that are sustainable over time. As stated by the United Nations, the science is clear: to limit climate change, reliance on fossil fuels must end, and buildings must be heated, lit, and electrified through clean, accessible, affordable, sustainable, and reliable power sources.

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Germany's contribution to the 19th Venice Architecture Biennale 2025 exposes visitors physically and psychologically to the future urban climate: a STRESSTEST that makes the need for immediate action palpable. The exhibition takes a clear stance: climate change is an unstoppable reality, and the measures taken so far are inadequate. It presents a scenario in which climate change manifests globally through rising temperatures, extreme weather, and sea level rise, with its effects directly felt at a local level: urban spaces suffering from heat stress. Curators Nicola Borgmann, Elisabeth Endres, Gabriele G. Kiefer, and Daniele Santucci have designed an exhibition to highlight the impacts of global warming on urban life in an urgent call to action, emphasizing that this reality threatens urban social life, productivity, and the health and survival of citizens.

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Architecture has always centered on permanence and ephemerality. Defined by material conditions, how we build is closely tied to what we preserve and how we conceptualize the future. Furthering international cooperation in education, the arts, the sciences, and culture, UNESCO is an organization that continues to examine the relationship between history and growth, preservation, and change. As architecture, landscapes, and cities become threatened by the climate crisis and unrest, cultural context becomes paramount.

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Now in its 20^th year, Berlin-based firm TOPOTEK 1 has been an enterprising player in the field of landscape architecture and public design, with a portfolio of projects that emphasize the social and formal roles that landscape assumes within built work. Largely responsible for the firm’s success this far is the man at the helm, Martin Rein-Cano, who has served as one of the founding partners since 1996.

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