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?

Question

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

Answer 1

Because we can’t “make” cold or heat, just move it around. If we wanted to freeze a large amount of something, we have to take heat out of it and put it somewhere else.