Railways, one of the most climate-friendly transportation modes, emit just 31 grams of
CO2 equivalents (CO2e) per passenger kilometer—half that of the most efficient electric vehicles. However, the carbon footprint of railway systems can be further minimized. A groundbreaking Finnish study published in
Frontiers in Sustainability explains how using sleepers made from recycled plastics instead of traditional ones could greatly reduce
greenhouse gas emissions.
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