Providing all global energy with wind, water, and solar power, Part II: Reliability, system and transmission costs, and policies

► We evaluate the feasibility of global energy supply from wind, water, and solar energy. ► WWS energy can be supplied reliably and economically to all energy-use sectors. ► The social cost of WWS energy generally is less than the cost of fossil-fuel energy. ► Barriers to 100% WWS power worldwide are socio-political, not techno-economic.