Improve sewage treatment
Currently, the treatment plants of Iona and Lions Gate are only primary and yet to be upgraded. Secondary treatment is the Canadian standard for cities, and when Vancouver reaches that we'll just be average. A Greenest City would have tertiary treatment of its sewage, and should be a primary goal. Innovative technologies should be explored and developed in Vancouver on a larger scale to set an example, and to market to other cities globally. One example is a Solar Aquatics system (http://www.ecological-engineering.com/solaraquatics.html), as demonstrated in Bear River, Nova Scotia.