The
material does not need energy to work nor does it need water to help keep
things cool. The engineers say the new material could provide an answer to air
conditioners, which are expensive to Ответ and
need a lot of water.

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Thematerial does not need energy to work nor does it need water to help keepthings cool. The engineers say the new material could provide an answer to airconditioners, which are expensive to Ответ andneed a lot of water.