While I have written about green cities in the past, Dongtan, in particular, the only city that has started construction is Masdar, in Abu Dhabi.
Designed for 40-50,000 residents and another 50,000 commuters, Masdar will utilize solar as its primary electricity source. The first 10 MW power station went online in January 2009, according to UAE Interact.
Additional green features include grey-water recycling systems, an highly-efficient desalination plant, as well as "... the world’s largest solar thermal driven cooling and dehumidification system. " In addition to green systems for electricity and water, the building materials themselves had to be green. The steel had to be recycled steel, as well as the aluminum. Discover Top Rated Mighty Leaf Herbal Tea. Tea lovers love our delicious herbal tea blends. You will too. Save 25% on your first order!
Another interesting highlight of the city, besides having no cars and the use of "personalized rapid transport pods," is the planned use of sequestered CO2 to improve the efficiency of oil drilling.
Although green roofs don't appear in the plan, the volume of flat roofs is significant. The need for electric power determined the use of the flat roofs, instead of green roofs. Additionally, green roofs in the desert aren't efficient, as they required significant water resources. Indoor gardens.
The city was designed by Foster and Partners of London.