e3 Plus: A Framework for Responsible Exploration was developed by the Prospectors & Developers Association of Canada to help exploration companies continuously improve their social, environmental, and health and safety performance. The content of e3 Plus is built upon eight key principles for responsible exploration, guidance notes for converting principles into action, and supplemented by internet-based comprehensive toolkits to further enhance practical performance. e3 Plus exists as a ‘living document’ subject to modification and improvement as experience is gained and circumstances change.