Low-energy urbanisation ‘can help climate goals’

A study of 274 cities has helped shed light on energy consumption in urban areas and what can be done to make future urbanisation more efficient.

Globally, cities are best placed to mitigate emissions as urban areas are much more energy intensive than rural areas, say researchers.

Most people now live in urban areas, a trend that is accelerating as the global population continues to grow.

The UN estimates that almost four billion people – 53% of the world’s population – currently reside in towns or cities. By the middle of this century, that figure is set to grow to 6.3 billion. In 1950, the urban population was under 750 million people.

Writing in their paper, a team of researchers from Germany and the US observed: “The most recent Intergovernmental Panel on Climate Change (IPCC) report shows that urban areas consume between 67% and 76% of global energy and generate about three quarters of global carbon emissions.

“Additionally, to accommodate growing urbanising populations and economies, urban areas and their built environment are projected to more than triple between 2000 and 2030.”

The team found that the mitigation potential of urban areas on a global scale was “insufficiently understood”, making it difficult to quantify what energy savings could be made through more effective planning and development.

In their study, the team analysed a dataset from 274 cities from 60 countries, including all of the world’s 21 megacities (urban areas with more than 10 million inhabitants).

The dataset allowed the researchers to identify different profiles of energy use by cities, which could then shape bespoke climate mitigation policies for urban areas that fitted a particular energy-use profile.

He added that urban areas’ high energy demands, especially in industrialised nations, were influenced by a range of factors – such as population density, fuel prices, transport infrastructure and technology – and it would require a high concentration of renewable and low carbon generation technologies in order to reduce emissions while meeting the soaring energy demands of global urbanisation.

“As our study shows, cities are indeed very different from each other but we can identify types of cities that are similar to each other (in terms of energy-use). We will then be able to see the global perspective of urbanisation.”

Source: BBC

N.H.Khider

 

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