system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is generating cold so much harder than heat?

Its easy to make an electrical device which can gegerate heat. But why is it there arent any portable devices which generate cold.
gpt
Because we don't generate cold. It's impossible to make "cold". Cold is the subjective property of something that lacks energy relative to it's environment. Modern refrigeration doesn't generate cold, rather it takes heat from one place and moves it to another through a process called evaporative cooling. 

Your sweat actually preforms evaporative cooling if you're curious to know how it works. Think of how sweat takes heat from your body as it evaporates, thus cooling off the body. Refrigeration works by using a chemical to take the heat from a space and then dump it outside the space you're attempting too keep cool.