http://www.un-gaid.org/en/blog/sustainableurbanization Sustainable Urbanization - The Blog en http://www.un-gaid.org/en/node/2375 <p>Between the beginning of the 19th Century and the beginning of the 21th Century the population of the world grew from approximately a little over a millionto about six and a half million. Cities, which until then had been essentially horizontal, added a second tier, mostly in the West, but also elsewhere in the world, growing vertically skyward, with the addition of high-rise buildings. Cities with populations of ten million or more will number about sixty within the next seven years. Cities will have to expand vertically again, downward, this time to add a third tier.</p> <p><a href="http://www.un-gaid.org/en/node/2375">read more</a></p> http://www.un-gaid.org/en/node/2375#comments http://www.un-gaid.org/en/crss/node/2375 Fri, 25 Apr 2008 12:53:18 +0000 dbennett 2375 at http://www.un-gaid.org http://www.un-gaid.org/en/node/2357 <p>The following comments about infrastructure and underground space are intended to 1) underscore the fact that infrastructure is essential to sustainable development and 2) to bring another dimension to the attention of planners; that of the unexpected option of efficiently using underground space to promote sustainable development and to aid in the fight against global warming.</p> <p><a href="http://www.un-gaid.org/en/node/2357">read more</a></p> http://www.un-gaid.org/en/node/2357#comments http://www.un-gaid.org/en/crss/node/2357 Thu, 17 Apr 2008 10:36:56 +0000 hparker 2357 at http://www.un-gaid.org http://www.un-gaid.org/en/node/2356 <p>With the wide range of cities represented at he<br /> April 23 Forum it would be interesting to know what issues the audience is most interested in hearing about and learning from. Please list your concerns for consideration in discussion.</p> <p>Lance Jay Brown</p> http://www.un-gaid.org/en/node/2356#comments http://www.un-gaid.org/en/crss/node/2356 Thu, 17 Apr 2008 09:28:11 +0000 lbrown 2356 at http://www.un-gaid.org