Westender: The water that comes out of most city taps in Canada is pretty clean. Yet many people prefer to spend money on bottled water, believing that it is somehow safer. Now we’re learning that the stuff in plastic water bottles may be more harmful than anything in our tap water. Bisphenol A is just one chemical that’s been in the news – and in many plastic bottles – recently. This compound mimics estrogens (human female hormones) and has been linked to breast and ovarian cancers and childhood …