If Mr Gore receives his party's nomination, the support of urban voters (and co-operation from urban mayors) will be absolutely essential for him to stand a chance in the presidential election.

ECONOMIST: City politics

Cape Town police have set up a special urban terrorist unit, Operation Good Hope, to investigate the incidents.

BBC: Reward for Cape Town bombers' arrest

The network facilitates the sharing of experience, knowledge and resources among the member cities as a means of promoting the development of local creative industries and fostering worldwide co-operation for sustainable urban development.

UNESCO: Recognises Dunedin Creativity

Established as a pilot operation in 1999 and one of 19 English urban regeneration companies whose job is to stimulate investment, New East Manchester is co-ordinating plans for regeneration east of the centre.

ECONOMIST: Urban regeneration

His main thesis is that the buzz of urban life, and the opportunities it offers for co-operation and collaboration, is what attracts people to the city, which in turn makes cities into the engines of art, commerce, science and progress.

ECONOMIST: Welcome to a world of high living

The TDI engine charges the battery while driving in order to store enough electrical energy for EV operation later in the journey-for instance, in an urban area.

ENGADGET: VW unveils CrossBlue plug-in SUV with iPad mini headrests and 85MPGe efficiency (eyes-on)

In 2009, NCC formally launched Operation Smart Child (OSC), an evidence based program designed in partnership with the Urban Child Institute, to improve brain and social skills development in children from conception to four.

WHITEHOUSE: Helping to Provide a Healthy Start for Children