The Canadian dollar weakened against the greenback on Tuesday, and the yield on benchmark government debt climbed. The loonie was trading 0.5% lower at C$1.373 to the greenback, or 72.83 U.S. cents, after trading in a range of 1.3659 to 1.3736. Canadian government 10-year bond yields rose 4 basis points to 3.801%. The yield on similar U.S. government benchmark debt rose to 4.6633%. U.S. June crude futures rose 32 cents to $82.95 a barrel on Tuesday.