Environmental problems have gone, when it comes to their discussion, beyond the purely scientific arena, to being also discussed at a political stage, giving birth to what has been called Political Ecology. The dimensions of the problem, as well as its global nature, have created some sort of political institutionality which ranges from international organisms, UNO, World Bank, etc, to very local organizations. This approach has two conceptual positions at its base: environmentalism, which gives preeminence to man over nature, with its trends ofEcodevelopment which leans on local ecology and culture; and Sustainable Development which leans on economic growth which should generate resources to alleviate environmental damage and social inequities. On the other hand Ecologism conceives man as another element within nature whose survival depends on accepting all the unbreakable links with the other living beings and the physical surroundings. It also has two trends: Deep Ecology which advocates respect for nature as a systemic unit within which man is immerse; and Global Ecoethics which stands for political action that departs from accepting current man’s responsibility towards the forthcoming human societies, whose wellbeing will depend on our respect for natural dynamics