Figure 14. Decarbonising the energy system. Global environmental change driven by mainly socioeconomic, demographic, institutional and technological changes causes public concern about fulfilling future needs. Meeting current and future energy demands while minimising global environmental impacts is a challenge that requires major transformation of the energy system, including production, consumption and the incentive structures that shape the interaction between the two. Possible options for transformation include shift to renewable energies, introduction of the CO2 emission trading and changes in lifestyle and values. (Courtesy of Vellinga and Wieczorek 2002).