character: Dr. David Lee
topic: Innovative Crop Varieties for Arid Regions
subject: Geography
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character: Professor Sarah Kim
topic: Sustainable Agriculture in Dryland Areas
subject: Geography
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character: Dr. Maria Gonzalez
topic: Water Efficiency in Agriculture
subject: Geography
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character: Dr. John Smith
topic: Climate Change Impact on Farming in Arid Zones
subject: Geography
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