The rise of LED lighting came at a time when people were just starting to be concerned about global warming. Because of LEDs? energy efficiency, using them for the world?s lighting would have “an extreme impact” on society.

　　The reason why blue LED lights won the 2017 Nobel Prize in physics is that they are to (1) ________ about big changes in lighting.

　　Save and green(2) ________ with other forms of lighting, LEDs are much more efficient because of the different (3) ________ they pass electric current. What’s more, LED bulbs can be (4) ________ 30 times longer than traditional bulbs.

　　Lighting the world (5) ________ household applications of LED bulbs, they can also be used as street lights and car headlights.

　　Because of their high efficiency, LEDs, especially solar­powered ones, (6) ________ to light areas without access to electricity.

　　Digital displays Many smart phones, laptops and televisions use LEDs to back­light their LCD (7) ________.

　　By using blue LED lasers, blu­ray players are likely to store (8) ________ data.

　　People are now exploring more (9) ________ uses of LEDs such as transmitting data.

　　Conclusion LED lighting will have a positive (10) ________ on environmental protection.

　　1．________　2.________　3.________　4.________

　　5．________　6.________　7.________　8.________

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