The global environmental change shows a great complexity in its data and consequences what poses problems for its understanding and for evaluating its undergoing risks. Sustainable development and sustainability are concepts associated to the environmental global change which present limitations on both the semantic point of view and the operational and appraisal issues. The exploration of the potential links between the scientific spheres and the sustainability concept points out to complex and mixed relationships. In any way, the understood effects indicate (...) the preeminence of climate as factor and its subsequent incidence on food, health, energy and environment. The analytical approach to the logics of knowledge reveals the relevance of feeding and health ecology. Lines or scientific research are proposed on a personal basis for addressing the following objectives: knowledge progress, risks evaluation, and improvement of energy supplies and uses and environmental conditions. It is recommended that ethical principles and conducts should be applied in all the global environmental change related processes: scientific, political, entrepreneurial, social and media information. (shrink)