WHICH OF THE FOLLOWING IS THE MAIN DISADVANTAGE OF SOLAR ENERGY

Câu 45: Which of the following is the main disadvantage of solar energy?A. It is expensive. B. Solar cells require large areas to operate. C. It is unfriendly to the environment.D. It depends on sunlight.Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blank.For all the talk of what humankind has done to cause (46) ………….to the planet, we should not forget that nature itself is a powerful force, capable of doing damage on a huge scale. The greenhouse (47) ……and the hole in the Ozone layer are indeed made worse by the industrialised society we live in. However, we must remember that ther are certain (48) …………. of plant and animal which, quite naturally, give off gases that are very harmful to the atmosphere. And only fifty years ago in London, hundreds of people died from the (49) ……….which hung over the River Thames. What’s interesting here is that, yes, smoke and gases from industry, vehicles and fossil fuels were ingredients in this deadly mixture. The other vital ingredient, though, was the completely natural fog, and who would have thought that could be (50) …..…?