system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 how wireless charging works and why it can/can't be put in roads to power electric cars?
gpt
Imagine you have two loops of wire very close to each other. You put an electrical current through one of the wires. This current creates a moving magnetic field around that first wire. This magnetic field drags the electrons in the second wire, creating a second current. 

The problem is that, even under the best circumstances it's not very efficient. A lot of energy gets wasted as heat. That, combined with the extreme cost is why we are unlikely to see it in use on roads anytime in the near future.