Securing abundant, affordable, and clean energy remains a critical scientific challenge. Fortuitously, large shale formations occur within Europe. As the conventional gas production in Europe peaked in 2004, European shale gas could become a practical necessity for the next 50 years. However, the exploitation of shale gas remains challenging. Further, its environmental footprint is at present poorly quantified. Great care is needed to assess and pursue this energy resource in the safest possible way for the long-term future of Europe whilst protecting the European diverse natural environment. With this in mind, ShaleXenvironmenT assembled a multi-disciplinary academic team, with strong industrial connections. A comprehensive approach is proposed towards ensuring that the future development of shale gas in Europe will safeguard the public with the best environmental data suitable for governmental appraisal, and ultimately for encouraging industrial best practice. The primary objective is to assess the environmental footprint of shale gas exploitation in Europe in terms of water usage and contamination, induced seismicity, and fugitive emissions. Using synergistically experiments and modeling activities, ShaleXenvironmenT will achieve its objective via a fundamental understanding of rock-fluid interactions, fluid transport, and fracture initiation and propagation, via technological innovations obtained in collaboration with industry, and via improvements on characterization tools. ShaleXenvironmenT will maintain a transparent discussion with all stakeholders, including the public, and will suggest ideas for approaches on managing shale gas exploitation, impacts and risks in Europe, and eventually worldwide. The proposed research will bring economical benefits for consultancy companies, service industry, and oil and gas conglomerates. The realization of shale gas potential in Europe is expected to contribute clean energy for, e.g., the renaissance of the manufacturing industry.