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I mozziconi di sigaretta potrebbero sparire dalla superficie di strade e marciapiedi per finire seppelliti al loro interno, inglobati direttamente nell'asfalto. L'idea è venuta a un team di ricercatori di Melbourne che ha trovato un modo per smaltire i 6’000 miliardi di cicche prodotti ogni anno nel mondo.
Una ricerca durata cinque anni ha permesso di dimostrare che l'asfalto mescolato con i mozziconi è in grado di sostenere il traffico intenso e riduce la conduttività termica. Oltre a risolvere un problema di inquinamento, la soluzione può servire ad attenuare l'effetto "isola di calore", il microclima più caldo che interessa più le aree urbane rispetto a periferie e zone rurali.
"Abbiamo incapsulato i mozziconi in bitume e paraffina per imprigionare le sostanze chimiche delle cicche e impedirne il rilascio dall'asfalto", spiega uno degli autori dello studio, Abbas Mohajerani. Mohajerani l'anno scorso ha pubblicato un'altra ricerca in cui ha illustrato la possibilità d’incorporare i mozziconi nei mattoni.
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