• Keeping cool without AC.
• Should air conditioning be rationed.
• Modular apartment buildings on the rise.
• Money in foreclosed homes for eco-flippers.
• New toilet turns waste into energy and fertilizer.
• A gorgeous Passivhaus in Tubingen, Germany.
• Playing catch-up: millions for fossil fuels.
• A big version of a weeHouse prefab.
• Energy-efficient homes.

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