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Enregistrement W215910814

A Crude Reality: Canada's Oil Sands and Pollution

2008· article· en· W215910814 sur OpenAlexaboutno aff
Anna Hopper

Notice bibliographique

RevueHarvard international review · 2008
Typearticle
Langueen
DomaineEnergy
ThématiqueGlobal Energy and Sustainability Research
Établissements canadiensnon disponible
Organismes subventionnairesnon disponible
Mots-clésOil sandsCrude oilOil reservesAsphaltPeak oilUnconventional oilFossil fuelHydropowerPetroleumPetroleum industryEnvironmental protectionBusinessNatural resource economicsEnvironmental scienceClimate changeGeographyEngineeringEconomicsWaste managementArchaeologyGeologyEnvironmental engineeringPetroleum engineering
DOInon disponible

Résumé

récupéré en direct d'OpenAlex

The United States and Canada enjoy one of the largest trading partnerships in the world, with energy serving as a vital component of that relationship. Canada exports 1.96 million barrels of oil per day to the United States, according to the Energy Information Administration. While Canada also supplies a large amount of clean hydropower to northern US regions, oil exports to the United States are both more substantial and, recently, more controversial. A large portion of Canadian oil coming to the United States is extracted from the oil sands in Alberta at high cost to the environment. With climate change becoming a vital global issue, many US leaders have begun to criticize Canada for sanctioning the dirty oil extraction process. Although this criticism has not yet translated into a serious decline in the US-Canada relationship, Canada will have a improve its environmental standards for oil sands in order to maintain healthy dealings with its southern neighbor. With over 170 billion barrels of recoverable oil known, Alberta's oil sands contain the second largest proven reserves in the world, behind only Saudi Arabia. But this Canadian oil is trapped in a tar-like substance known as bitumen. Until recently, these resources remained relatively untapped, due to the fact that extracting crude oil from the sands is much more expensive than drilling for conventional crude oil. However, with the recent spike in oil prices, extraction from the sands has become profitable, and oil companies are seizing the opportunity. In July 2008 they extracted 1.3 billion barrels of heavy crude oil per day from the sands. Unfortunately, the environmental costs of this extraction are just as high as the profit being made. Because the oil in the sands is low grade crude, extracting and refining one barrel of its requires three times as much energy as producing a barrel of conventional oil, and releases three times as much carbon dioxide into the atmosphere. At the same time, side effects of increasing oil extraction, including vast deforestation, also contributes to ever-growing emissions. The area is now the most rapidly increasing sources of greenhouse gas emissions in Canada. Furthermore, washing the bitumen to separate the oil and sand wastes over 12.7 billion cubic feet of water per year. This results in both a lock of local water resources and a large amount of water pollution. Reports have also surfaced of deformed fish in the toxic lakes surrounding the extraction area. These huge environmental impacts are drawing the attention not only of environmentalists but also of leaders in the United States. Both 2008 US presidential candidates, John McCain and Barack Obama, spoke out against the purchase of environmentally dirty energy from sources like Alberta's oil sands. Arnold Schwarzengger, governor of California, signed an agreement to limit oil imports from producers with large carbon foot prints. Furthermore, 1,000 US mayors banded together and agreed to refuse imports of oil refined from areas with unusually high greenhouse gas emissions, like Alberta's oil sands. …

Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.

Comment cette classification a été obtenuedéplier

Prédiction distillée sur la base complète

Imitation des enseignants

Ni prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.

score de la tête « metaresearch » (Codex)0,000
score de la tête « metaresearch » (Gemma)0,001
Version: codex-gemma-dda1882f352aStatut de validation: machine_predicted_unvalidated
Catégories candidatesCharge utile insuffisante (le modèle a refusé de juger)
Catégories consensuellesaucune
DomaineSignal candidat: aucune · Signal consensuel: aucune
Devis d'étudeSignal candidat: Sans objet · Signal consensuel: aucune
GenreSignal candidat: Empirique · Signal consensuel: aucune
Score de désaccord entre enseignants0,813
Score d'incertitude au seuil0,999

Scores Codex et Gemma par catégorie

CatégorieCodexGemma
Métarecherche0,0000,001
Méta-épidémiologie (sens strict)0,0000,000
Méta-épidémiologie (sens large)0,0000,000
Bibliométrie0,0000,000
Études des sciences et des technologies0,0000,000
Communication savante0,0000,000
Science ouverte0,0000,000
Intégrité de la recherche0,0000,000
Charge utile insuffisante (le modèle a refusé de juger)0,0010,000

Scores machine (provisoires)

Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.

Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.

Tête enseignante Opus0,025
Tête enseignante GPT0,291
Écart entre enseignants0,265 · la distance entre les deux têtes enseignantes sur ce seul travail
Statut de validationscore_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle

Classification

machine, non validée

Prédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.

Devis d'étudeSans objet
Domainenon disponible
GenreEmpirique

Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».

En bref

Citations2
Publié2008
Routes d'admission1
Résumé présentoui

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