context: According to a 2011 projection by the International Energy Agency, solar power plants may produce most of the world's electricity within 50 years, significantly reducing the emissions of greenhouse gases that harm the environment. The IEA has said: "Photovoltaic and solar-thermal plants may meet most of the world's demand for electricity by 2060 – and half of all energy needs – with wind, hydropower and biomass plants supplying much of the remaining generation". "Photovoltaic and concentrated solar power together can become the major source of electricity".
question: సౌర శక్తి ప్లాంటు 50 సంవత్సరాల లోపల ప్రపంచం లో అత్యధిక విద్యుత్తు ను ఉత్పత్తి చేయగలదని ఏ గ్రూపు అంచనా వేసింది?
answers: International Energy Agency