Cigarette butts are the most common form of litter in Sweden, accounting for roughly 62% of all street waste and costing cities millions in annual cleanup fees. In Södertälje alone, the municipality spends approximately 20 million Swedish kronor (roughly $2.2 million USD) each year to keep the streets clear of these persistent filters. The project utilizes a custom-designed "bird bin" that automatically dispenses a small food reward, such as a peanut or seed, every time a crow deposits a cigaret

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