We need to be building towns and cities from the materials at hand:

Circular Economy: Designing for Bioregions

“Designing for a circular economy requires consideration of human habitats not as towns or cities, but as bioregions.”

“Designers must study the location and context of a building site to ascertain how the new construction can contribute to the existing ecology. What is required is an understanding of the site’s bioregion – an area defined by characteristics of the natural environment rather than by man-made divisions.”

“The earth is home to over 800 ecoregions. Each one requires different ways of inhabiting it in an environment-friendly manner. Circular buildings should be designed in harmony with the cyclical functions of its bioregion – sharing energy, and resources, and eventually healthily decaying into the region. Urban areas must be reconceived so that they can assume a responsible position in the Earth’s biosphere.”

Circular Economy: Designing for Bioregions | ArchDaily

It’s something we really need to be doing: Building houses with local materials: means to drastically reduce the environmental impact of construction – ScienceDirect

They’re doing it in Dorset: Local-materials-in-construction.pdf

We’ve done it in Devon: BUILDING A COB HOUSE – INTRODUCTION TO COB – YouTube

21st century cob building in East Devon, England, by Kevin McCabe: The Cob House – Cadhay.jpg – Wikimedia Commons