perspectivEs Costa Rica 100% Renewable: Keys and Lessons from a Successful Electric Power Policy  Estiven González Jiménez F ebrero 2017 n On March 25, 2015, Costa Rica announced that during 75 consecutive days it had produced 100 per cent of its electricity from renewable sources. Although it was not the first time the country had achieved this goal, that news traveled around the world as a symbol of the ecological transformation of the electrical grid. n In order to achieve climate goals, countries must re-evaluate their market schemes through clear regulations that do not respond to market variables only, but also to strategic goals aimed to consolidate a model of transformational, sustainable and inclusive development. n The history of Costa Rica demonstrates that for more than a century progressive politicians and social movements have been instrumental in the definition and protection of energy as a public good. A State policy had established clear objectives and standards favoring the sustainability and social justice of the electric power system. A