Energy development Energy development [ 4] [ 5] [ 6] is a field of endeavor focused on making available sufficient primary energy sources [ 7] and secondary energy forms to meet the needs of society. [ 8] [ 9] [ 10] [ 11] [ 12] These endeavors encompass those which provide for the production of conventional, alternative and renewable sources of energy, and for the recovery and reuse of energy that would otherwise be wasted. Energy conservation [ note 2] and efficiency measures [ note 3] reduce the impact of energy development, and can have benefits to society with changes in economic cost and with changes in the environmental effects . Energy development Total Renewables split-up by source Fossil Renewable Nuclear Biomass heat Solar-water Geo-heat ...