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This book presents an overview of the current understanding of gravitation, with a focus on the current efforts to test its theory, especially general relativity. It shows how the quest for a deeper theory, which would possibly incorporate gravity in the quantum realm, is more than ever an open field. The majority of the contributions deals with the manifold facets of “experimental gravitation”, but the book goes beyond this and covers a broad range of subjects from the foundations of gravitational theories to astrophysics and cosmology. The book is divided into three parts. The first part deals with foundations and Solar System tests. An introductory pedagogical chapter reviews first Ne...
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Available online: https://pub.norden.org/temanord2021-525/ Nordic agricultural producers face a large challenge in meeting a growing food demand while addressing climate and environmental challenges. The eight case studies presented in this report show first-hand how farmers and food producers are taking initiative to develop new farming practices and food products that are more sustainable. But these cases also illustrate specific challenges for these new products. The 36 policy recommendations illustrate that there is still a lot of potential to support the transition towards a low-emission food production system in the Nordics at all levels. A multitude of instruments need to be put into play to incentivise more sustainable agricultural practices. But if sustainable and more plant-based agricultural production and consumption is prioritised and expanded it is possible to feed 9.8 billion people and meet emissions reduction targets.