| 1 | There are a number of different ways to use thorium to produce electricity. | |
| 2 | Rare earth mines often also contain radioactive elements, such as uranium and thorium. | |
| 3 | The calculation from the neutrino work yields 20 terawatts for uranium and thorium. | |
| 4 | At issue is coal's content of uranium and thorium, both radioactive elements. | |
| 5 | Compared to uranium, thorium is far more abundant as well as much more energy-dense. |