Enbridge Inc. of Calgary plans to buy Houston-based Spectra Energy Corp. for stock worth $37 billion.  The combination of the two pipeline companies would create a North American energy infrastructure giant.  The combined company’s natural gas pipelines business would be based in Houston, and the liquids pipelines business would be based in Edmonton.  The complete story can be read at:  www.cbc.ca/news/business/enbridge-spectra-merger-deal-1.3749340