Processing requires massive inputs of water, energy, land, labour

For each barrel of oil produced from the tar sands, between two and 4.5 barrels of water is needed. The water is used in the process of extracting bitumen from the naturally occurring the tar sand. The bitumen is later "upgraded" into synthetic crude oil.

In 2007, the government of Alberta approved the withdrawal of 119.5 billion gallons of water for tar sands extraction, of which an estimated 82 per cent came from the Athabasca River. Of that, extraction companies were only required to return 10 billion gallons to the river.


Most of the water used ends up in giant, toxic tailing ponds. As of 2006, tailing ponds covered 50-square kilometers of former boreal forest. By 2010, according to the Oil Sands Tailings Research Facility, the industry will have generated 8 billion tons of waste sand and 1 billion cubic metres of waste water--enough to fill 400,000 olympic-sized swimming pools. Today, the largest human-made dam by volume of materials is the Syncrude tailing pond, a few kilometres from the Athabasca river.

The waste sand and water contain naphtha and paraffin, which are used in the extraction process, and oil leftovers like benzene, naphthenic acid and polyaromatic hydrocarbon, among others. Chemicals found in the tailing ponds are known to cause liver problems and brain hemorrhaging in mammals, and deformities and death in birds.

It is difficult to estimate the volume of toxins that make their way into the Athabsca, but downstream communities like Fort Chipewyan have reported high occurrences of rare cancers, lupus, multiple sclerosis and other diseases in recent years. Local fishermen have reported boils and deformities in fish. One winter, an oil slick was discovered under the ice. Syncrude later admitted that there had been a spill about 200 kilometres upstream.