Against a backdrop of mounting geopolitical tensions and a deepening climate crisis, a new policy brief urges that climate policy be firmly embedded in European security strategy. The report, “Mainstreaming 1.5° Lifestyles: Sustainable Security through Climate Action,” was released today by the Research Institute for Sustainability (RIFS) at the GFZ Helmholtz Center for Geosciences as part of the EU research project “1.5° Lifestyles.”