STUDY CLIMATE CHANGE, ENERGY AND ENVIRONMENT SUSTAINABLE TRANSFORMATION OF TUNISIA’S ENERGY SYSTEM Development of a Phase Model By applying a phase model for the renewables-based energy transition in the Middle East and North Africa(MENA) countries to Tunisia, the study provides a guiding vision to support the strategy development and steering of the energy transition process. The Tunisian electricity sector faces three main challenges: high dependence on imported fossil fuels, distortive subsidies, and a weak financial performance at utility level. Sibel Raquel Ersoy, Julia Terrapon-Pfaff December 2021 The upscaling of renewables in Tunisia offers the opportunity to meet the growing electrici­ty demand, reduce the energy deficit, and foster economic development.