As more people want to stay cool in a planet that is steadily heating up, energy experts point to water-based system as a good alternative
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Some large organizations are able to run the systems on their own, like the UN or Cornell University in New York
One advantage of water systems is that they avoid emissions of hot air into cities already enduring heat waves
Deep in the bowels of the UN headquarters, a pump sucks in huge amounts of water from the East River to help cool the complex with an old but …