Volcanic Popcorn To Keep Houses Warm

Technology

Photo credit: Gardeners use expanded perlite (white stones) to assist drainage, but its greatest value could come at the core of vacuum insulation panels. Brandon Blinkenberg/Shutterstock.

A volcanic ore is set to move from the garden and into the house, slashing the costs of insulation and in the process helping to cut energy consumption and pollution.

When it comes to finding the least expensive ways to replace fossil fuels, nothing is as cheap as the...

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