When the fields of coal disappear, and when the oceans of oil dry up.

Yes, but.....

Thats were renewable resources like solar power come into play. If we can switch from oil and coal burning to a cleaner, more efficient source of energy like solar or wind power, we could stop pollution and save the planet. A few extra dollars paid today will save the world. Literally.

It wouldn't be as efficient though, and it is a lot more expensive than coal. Imagine being a car manufacturer and being required to use solar energy on your cars!