Housing that is “fast, affordable and absolutely green” will free up cities of the future to build without using any concrete.

That’s according to the chairman of a Spanish environmental housing company, which built one of their new homes in just 32 days, as part of the UN’s recent Habitat III conference in Quito, Ecuador.

The construction relies on a mix of wood and plastic recycled materials, minimal use of steel, with a focus on energy-efficiency and insulation.

The conference on the future of world cities showcased new technologies and designs to help reduce harmful carbon emissions and promote sustainable development.

Matthew Wells reports from Quito.

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