Below are the nations with the 10 largest known reserves.

The region is home to the world's largest known reserves of brown coal.

The find added about 10 percent to California's known reserves.

The United States is nearly self-sufficient in natural gas, with known reserves much larger than for oil.

Since the 1980s, the number of known reserves has increased substantially.

As of 2002, the country has no known reserves of oil, natural gas or coal.

The nation produced 16.7 trillion cubic feet of natural gas from known reserves last year.

The demand for oil and natural gas is expected to exhaust known reserves by 2045.

With the world deprived most of its known reserves, oil prices would jump, let's say, fivefold.

The charge has a surface plausibility because Iraq does have the second-largest known reserves in the world.