Book excerpt: this book contains additional research papers submitted for a meeting on sustainable development and planning organized in 2011 by the Wessex Institute of Technology (WIT). WIT has a long and very successful record of organizing conferences on the topic of sustainability, which requires an interdisciplinary approach. Any sustainable solutions that are derived solely from the perspective of a single discipline may have unintended damaging consequences that create new problems.Thus effective sustainable solutions require the collaboration of scientists and engineers from various disciplines, as well as planners, architects, environmentalists, policy makers, and economics. These experts must not only communicate with each other effectively, but also understand the social aspects of the problem at hand. The contents of the book reflect that interdisciplinary approach.The topics covered by the papers in the book include: City Planning, Regional Planning; Social and Political Issues; Sustainability in the Built Environment; Rural Development; Cultural Heritage; Transportation; Ecosystems Analysis; Protection and Remediation; Environmental Management; Environmental Impact Assessment; Indicators of Sustainability; Sustainable Solutions in Developing Countries; Sustainable Tourism ; Waste Management; Flood Risk Management; Resources Management; Industrial Developments.