In order to reduce the melting of polar ice, why couldn’t we use liquid nitrogen in some ways, to freeze parts of the pole’s seas?
In: Physics
The Earth is a huuuge thermodynamic system, and we can (mostly) only move heat around within it. We would make liquid nitrogen by extracting heat from gaseous nitrogen, but that heat would just go somewhere else. We can then move the liquid nitrogen elsewhere and (temporarily) make that place cooler, but this becomes harder to pull off the bigger the space. “The poles “is a huge area, big enough that it would require an incredible effort to cool it down by transporting cold materials into it, and that would be at the cost of heating up the rest of the Earth. Eventually the heat extracted from the liquid nitrogen would start to bleed back into the poles.
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