The Dar es Salaam stimulus paper has so far attracted 12 comments from as widely spaced locations as Canada, the United Kingdom, Australia, Hong Kong and Tanzania; pointing to as wide a range of issues as population migration into cities, problems such as traffic congestion, unplanned housing, stress on social delivery services, urban poverty (leading in some extreme cases to throwing of newly-born babies into garbage pits), as well as the issue of satellite towns as a strategy for relieving pressure in urban centres and spreading amenities wider.