The Tianjin Marathon has attracted over 33,000 runners from 39 countries.
Runners were given eco-friendly towels, seed postcards, and recycled plastic bags to reduce carbon emissions by 11.6 tons.
The Marathon Expo showcased the development of Tianjin Marathon over 40 years with historical materials and innovative displays.
The exhibition used biodegradable materials, corrugated paper booths, and featured recycled materials and environmental protection installations.
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Author's summary: Eco-friendly Tianjin Marathon reduces carbon footprint.