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It's always hard to know what to believe, since environmentalists have so often cried wolf. However, it seems plausible that insect populations have declined as a result of the use of pesticides / herbicides.
These robot weeders use cameras to quickly identify weeds and laser them to death, thus obviating the need for herbicides.
These robot weeders use cameras to quickly identify weeds and laser them to death, thus obviating the need for herbicides.