1) What percentage of global energy storage is currently in pumped hydroelectric facilities? a) 50% b) 75% c) 95% d) 100% 2) Which of the following is NOT a renewable energy source? a) Biomass b) Petroleum c) Solar power d) Geothermal energy 3) What is the main advantage of lithium-ion batteries mentioned in the text? a) Low cost b) Easy to recycle c) High efficiency d) Unlimited lifespan 4) What technology helps prevent overheating in lithium - ion batteries a) Solar panels b) Hydroelectric dams c) Smart technology d) Wind turbines 5) Which process involves the reduction of carbon emissions? a) Decentralisation b) Deceleration c) Decarbonisation d) Deposition

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