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New Zealand's Wednesday Challenge reduced emissions by 420,000 kg and cut car use in 2025.
The Wednesday Challenge, a New Zealand initiative promoting sustainable commuting, recorded over 954,000 journeys in 2025, reducing CO2 emissions by more than 420,000 kilograms and keeping over 300,000 cars off roads.
Schools and businesses across multiple cities reported significant drops in car use, improved employee well-being, and student-led sustainability efforts.
The program, now in its fourth year, plans to expand in 2026 with new tools to track health and environmental impacts, emphasizing collective action for lasting change.
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El Wednesday Challenge de Nueva Zelanda redujo las emisiones en 420,000 kg y redujo el uso de automóviles en 2025.