5. Singapore
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Singapore, the “Garden City,” excels in integrating nature with urban living. Its commitment to sustainability is seen in its water conservation efforts, green buildings, and the iconic Gardens by the Bay, a testament to the city-state’s dedication to green infrastructure.
6. Reykjavik, Iceland
![](https://ninan.org/wp-content/uploads/Reykjavik-Iceland-1024x410.webp)
Reykjavik sets an example with its use of geothermal energy, powering the majority of its homes and businesses. The city’s clean air, extensive green spaces, and commitment to renewable energy sources highlight its status as a leader in environmental stewardship.