| 1 | It's difficult to ascertain the coal deposits. | |
| 2 | They proved up 22 billion tons of oil in reserves in this country. | |
| 3 | Saudi Arabia, by comparison, has21 percent of the world's proven oil. | |
| 4 | Saudi Arabia controls about a fourth of all the world's proven oil reserves. | |
| 5 | OPEC nations have about two thirds of the world's proven conventional crude reserves, and one third of its production capacity. |