Tunisian association of applied geology (ATGA) aimed, since its creation, to continuously held biannual meetings. Challenges arising from the implications of progressive economic development are threatening the whole ecosystem. The first International Conference on Applied Geology & Environment (iCAGE 2016), will be dealing with Earth Sciences, including the pressing naturally occurring problems and management of natural resources. The conference will provide a platform for active discussions regarding these real time issues. Examining the current practices and determining the policies of the future endeavors occupy a prominent place in this conference. In fact, many critical challenges have to be taken into account: Environmental, Scientific/Technical, Governance, Health and Socio-economic challenges.