Mac tar sands can definitely provide a great source of revenue. A little about TAR SANDS:
Tar sands (also referred to as oil sands) are a combination of clay, sand, water, and bitumen, a heavy black viscous oil.
Tar sands can be mined and processed to extract the oil-rich bitumen, which is then refined into oil. The bitumen in tar sands cannot be pumped from the ground in its natural state; instead tar sand deposits are mined, usually using strip mining or open pit techniques, or the oil is extracted by underground heating with additional upgrading.
New methods introduced in the 1990s considerably improved the efficiency of tar sands mining, thus reducing the cost. After mining, the tar sands are transported to an extraction plant, where a hot water process separates the bitumen from sand, water, and minerals.