Bank of Canada Governor Mark Carney, however, indicated that a strong Canadian dollar — the result of U.S. economic weakness and higher world oil prices — could hammer the country's foreign exports.
http://www.cbc.ca/news/politics/story/2011/04/13/bank-of-canada-monetary-policy-report.html
http://www.cbc.ca/news/politics/story/2011/04/13/bank-of-canada-monetary-policy-report.html