Your feedback is important to us!
We invite all our readers to share with us their views and comments about this article.
Disclaimer: Comments submitted by third parties on this site are the sole responsibility of the individual(s) whose content is submitted. The Daily Star accepts no responsibility for the content of comment(s), including, without limitation, any error, omission or inaccuracy therein. Please note that your email address will NOT appear on the site.
Alert: If you are facing problems with posting comments, please note that you must verify your email with Disqus prior to posting a comment. follow this link to make sure your account meets the requirements. (http://bit.ly/vDisqus)
Cities are hubs of economic and social power.Rapid urban development comes at a heavy cost.This is a main goal of the U.N. Conference on Sustainable Development, which has warned of the unprecedented pressures that economic growth will impose in coming decades on infrastructure (especially transportation), housing, waste disposal (especially of hazardous substances) and energy supplies.To achieve this, the world must meet six broad challenges.Likewise, tightly integrated mass transit systems reduce greenhouse-gas emissions dramatically.This means shifting from private cars to public transportation and from road to rail.This requires us to integrate the various aspects of water management, such as household supply, rainwater harvesting, wastewater treatment and recycling, and flood-control measures.With some simple technological and design improvements – aimed, for example, at achieving higher rates of composting and recycling – 90 percent of this waste could be converted into something useful, such as biogas and resource-derived fuel.
FOLLOW THIS ARTICLE