Transformation of world energy composition and future of solar energy in the 21st century

Long-term forecasts show that major change will be arising world energy composition in the 2 1 st century. In the 21 st century the current world energy system based on fossil,Is will be transformed to a new type of world energy system based on the renewable energy. The fossil fuels accounted for around 87% in the world primary energy consumption at the end of the 20th century. But in the 21st century the proportion of fossil fuels in world primary energy composition will be decreasing, and the proportion solar and other renewable energy will be increasing. solar energy will get quick development in the 21 st century. me forecasts show that solar energy will account for about 25-30% at the end of the 21 st century.