http://edition.cnn.com/2016/08/25/arts/city-of-possibilities-etienne-malapert/index.html
The biggest problem is that the carbon-zero city was planned and designed by people out of United Arab Emirates. So, harsh conditions of desert were not considered well.
And, an ideal city can not be constructed on extremely rural area, but can be additionally constructed on urban areas.
In other words,
"Rome wasn't built in a day"
