For anyone who’s ever staggered onto the 1 train looking like they’ve just completed a Bikram yoga class, relief may finally be on the horizon. The MTA is exploring geothermal cooling—a technology more commonly used to heat and chill buildings—as a way to keep New York’s notoriously sticky subway platforms tolerable in the summer.

In a request for information issued last week and first reported on by The City , the agency asked experts to pitch ideas for tapping into the earth’s subsurface to move and store heat. The concept is deceptively simple: Take all that stagnant, suffocating platform air and push it down into the ground, where temperatures remain relatively stable. If it works, stations could hover around 82–85 degrees on even the hottest days.

The first guinea pi

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