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Unit 1 Artificial Intelligence Text A Artifi cial Intelligence: Friendly or Frightening? Text B AI Summit Aims to Help World's Poorest Text C Th e Weapoof Doomsday: AI Unit 2 Planet Protection Text A How Would Just 2 Degrees of Warming Change the Planet? Text B Th e Risk of ExtinctioIs Highest for Earth's Largest and Smallest Animals Text C 7 High-tech Tools to Combat Poaching Unit 3 Virtual Reality Text A How Virtual Reality Works Text B Virtual Reality Helps Distract Kids from Painful Medical Procedures Text C How Project Morpheus Works Unit 4 Unmanned Technologies Text A Drone Trends to Watch in 2018: Big Data, Flying Tas and Home Security Text B Driver-less Cars and How They Would Change Motoring Text C How Amazon Go Will Revolutionize Retail Convenience Unit 5 New Energy and Climate Text A Artifi cial Photosynthesis¡ªthe Potentially Cleanest Technology Text B Turn CO2 into Valuable Products Text C The Disruptive Power of the Renewables Unit 6 Social Networking Text A Why WhatsApp Only Needs 50 Engineers for Its 900M Users Text B Social Media and the Big Data Explosio Text C Advantages and Disadvantages of Social Networking Unit 7 Space Exploratio Text A Leaders Satellites Space: the Next Startup Frontier Text B Searching for Aliens: the Wow Factor Text C China's Commercial Aerospace Dream Edges Closer to Reality Unit 8 Medical Science Text A FDA Approval Brings First Gene Therapy to the United States Text B After Surgery ithe Womb, a Baby Is Kicking up Hope Text C Current Alzheimer's Treatments