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flag Study finds Roman concrete, while high in CO2, emits fewer air pollutants than modern versions.

flag A recent study in iScience compares the environmental impact of Roman concrete to modern versions. flag Though Roman concrete produces similar or higher CO2 emissions, it emits significantly fewer air pollutants like nitrogen oxide and sulfur oxide. flag Made from volcanic ash and lime, it is durable and long-lasting, potentially reducing the need for frequent replacements. flag Researchers suggest these ancient methods could offer lessons for making today's concrete more sustainable.

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