Glacier FarmMedia | MarketsFarm — The Canadian dollar was slightly firmer Thursday morning, edging above the 70 U.S. cent mark. At 8:36 a.m. CST the Canadian dollar was trading at US$0.7001 or US$1=C$1.4284 which compares with Wednesday’s close of US$0.6994 or US$1=C$1.4298. Investment in building construction in Canada rose 1.9 per cent in December to