Waste and┬áwetlands┬áThe heavily populated area to the east of Toronto has built a sewage system that is both fit for purpose and respectful of the residents and the natural scenery of Ontario, as John OÔÇÖHanlon discovers. The Greater Toronto Area has been growing massively since the 1960s and now has a population of 5.5 million, almost half of them born outside of Canada. And in turn, half of these immigrants have come to Canada in the last 15 years.