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Oil sands, also known as tar sands, or extra heavy oil, are a type of bitumen deposit. The sands are naturally occurring mixtures of sand or clay, water and an extremely dense and viscous form of petroleum called bitumen. They are found in large amounts in many countries throughout the world, but are found in extremely large quantities in Canada and Venezuela. Oil sands reserves have only recently been considered to be part of the world’s oil reserves, as higher oil prices and new technology enable them to be profitably extracted and upgraded to usable products. Oil sands are often referred to as unconventional oil or crude bitumen, in order to distinguish the bitumen extracted from oil sands from the free-flowing hydrocarbon mixtures known as crude oil traditionally produced from oil wells. Read More: > HERE <

What Are 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. See the Photos page for additional photos of tar sand and tar sand mining. FULL ARTICLE: > TAR SANDS BASICS < (Basic information on tar sands technology, resources, and issues of concern.)

Greenhouse gas emissions from tar sands production are three times those of conventional oil and gas production [currently tar sands production emits 27 megatonnes per annum and is expected to rise to 108-126 megatonnes by 2015]. Thus, the tar sands are now poised to become Canada’s largest single emitter of greenhouse gas, compounding this country’s contribution to global warming. Additionally, tar sands production is expected to multiply as much as four to five times by the year 2015 to meet growing demands in the U.S. As a consequence, conservative estimates show that greenhouse gas emissions from the tar sands could well leap from 27 to 126 million tonnes by 2015.

Read more — http://www.tarsandswatch.org/global-warming