+Tar sands, also known as [Oil Sands](/wiki/oil_sands), are a natural mixture of sand, clay, water, and bitumen, a dense, viscous form of petroleum. This resource requires significant [Extraction](/wiki/extraction) and processing to yield usable crude oil.
+## See also
+- [Fossil Fuels](/wiki/fossil_fuels)
+- [Climate Change](/wiki/climate_change)
+- [Bitumen](/wiki/bitumen)
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