Some Experts Look to Hydrogen to Help Fight Climate Change

Scientists are hoping that the simplest element in the universe — hydrogen — can be the solution to slowing down climate change. However, it does not come without cost. The process of making hydrogen could potentially add more CO2.
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Can NYC Finally Cool Its Subway?
Why is the NYC subway platform so hot? One rider built his own sensor network to find out. We explore the geothermal fix the MTA is piloting right now.
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