Notice bibliographique
Résumé
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 enseignantsNi 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.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
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.
score_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 découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».