无人机与AI上阵，助力巴西里约山地植树造林！
Brazil’s Rio de Janeiro and a startup use drones(无人驾驶飞机) to help reforest(重新造林) Brazil.
Drones fly over difficult terrain(地形). They get important information about soil, animals, and plants. Artificial intelligence (AI) helps with this. After this, they find places where to put seeds. The drones work 100 times quicker than working by hand. They can spread(传播) 180 seeds every minute.
This makes reforestation much faster.
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