28.What was the direct cause for the 0.2%drop in electricity from fossil fuels?A.The global demand for electricity decreased.B.The price of fossil fuels became too expensive.C.Solar and wind power met the increased demand.D.Many countries stopped using coal for electricity.29.What does Aditya Lolla imply about the current situation of clean energy?A.It is still something we can only dream of.B.It has become a practical and growing reality.C.It is growing too fast for power grids to handle.D.It has already replaced fossil fuels in transport.30.What is the main role of battery storage?A.It is the primary source of new electricity.B.It helps cut the cost of clean renewable energy.C.It solves the problem of solar power's instability.D.It is the main reason for the drop of fossil fuels usage.