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As countries race to cut greenhouse gas emissions, scientists are exploring innovative ways to remove carbon dioxide (CO2) that is already in the atmosphere. One approach attracting growing attention involves something surprisingly simple: spreading finely crushed volcanic rock over farmland.

In 2003, scientists began closely examining how an old hunting technique called fladry could be transformed into a modern, non-lethal tool for reducing conflicts between wolves and livestock. Originally used in parts of Eastern Europe and Russia to guide wolves toward traps, lines of hanging flags were later tested as a way to keep wolves away from vulnerable livestock areas.