For those interested, I asked ChatGPT 4 about the copper situation and it agreed with B. I then asked about potential substitute materials and it mentioned Silver (great conductor but too expensive and tarnishes), Gold (similar) and Aluminium (doesn't conduct as well, about 61% compared to copper).

In regards to the implications of switching to aluminium it said:

Aluminum has approximately 61% of the conductivity of copper. This means that for a given amount of current, a wire made of aluminum will need to be larger in diameter than a comparable copper wire to have the same resistance and carry the same amount of current.

If we used aluminum extensively in the power grid:

1. **Weight and Cost**: Aluminum is lighter and less expensive than copper, which are significant advantages. For overhead power lines, where the weight of the cable can be a concern, aluminum is often used, despite its lower conductivity.

2. **Size**: Because aluminum has a lower conductivity, we would need to use thicker cables to transmit the same amount of power. This could potentially be an issue in situations where space for cables is limited.

3. **Creep and Corrosion**: Aluminum also has a tendency to slowly deform under load, a phenomenon known as "creep." Over time, this can loosen electrical connections, potentially leading to dangerous arcing or fire hazards. It also oxidizes more easily than copper, and this oxide layer can interfere with electrical connections.

For electric cars:

1. **Space and Weight**: As space and weight are at a premium in electric vehicles, the use of aluminum might pose challenges due to the need for larger cables. The lighter weight of aluminum could be an advantage, but it might not offset the disadvantage of the extra space required.

2. **Efficiency**: Lower conductivity means more power loss in the form of heat. In an electric vehicle, where efficiency is key, this could reduce the vehicle's range.

3. **Durability**: The creep and corrosion issues mentioned above could also be a concern in the harsh environment of a vehicle, potentially leading to reliability issues over time.

That said, these are generalized concerns and the actual impact would depend on the specific design of the power grid or vehicle, as well as advancements in aluminum wire technology, alloying elements, or protective measures that could mitigate some of these issues.