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34DWildfires are among the most destructive forces on Earth.When these fires burn intotowns and cities on the edges of forests or wildlands,the economic damage and loss of life canbe massive.Meanwhile,higher global temperatures and extreme heat waves increase the dan-ger from wildfire spread.How are today's firefighters dealing with massive wildfires?They're35doing it by using the most advanced technology.Whether it's with unmanned aerial vehicles (UAVs)or advanced thermal imaging cameras(热像仪)，we take a look at the tech behind fighting some of the world's most dangerous fires..Teams tackling the California wildfires used the Global SuperTanker-a modified giant jetthat carries almost73,O00 liters of fire retardant(灭火剂)一while the S64 Aircrane heavy-lifting helicopter carries 10,000 liters of water.第These air tankers are used to put out flames and monitor fire through sensors and videofeeds coupled to GPS data.Fed into advanced computer modelling software,they can help pre-选dict the fire's behavior and possible spread patterns.Computer models can provide small areacoverage only meters wide,mapping terrain(and airflow.Fires are especially responsivegrto wind conditions and these tools allow firefighters to determine the passage of flames atground level.coBut manned aircrafts need a large investment in maintenance and crew training.Commandand control centers are turning to UAVs such as drones to keep costs down and provide addi-Betional capabilities.Infrared cameras()and thermal cameras can see through smoke to monitor ground1SSteams and let them know when conditions change.UAVs can provide georeferenced aerial ima-sioges,heat maps,and temperature scales of fire zones.Specialist drones can even carry hoses(to less accessible areas.In the future,lots of autonomous drones could be used to trackabewildfires and spot fire spread.wO32.What does the underlined word "destructive"in paragraph 1 mean?A.Eye-catching.B.DamagingC.Traditional.D.Attractive.tim33.What is a disadvantage of manned aircrafts when compared with unmanned aerial vehicles?A.They cost much more.B.They lack GPS data.meC.They have no sensors.海·10·D.They carry less retardant.