Is tech a chocolate teapot when it comes to green cities?

Technology has the potential to help build smarter, greener cities, but whether it will is another matter.

That was the takeaway from a panel discussion on Wednesday at Fortune's Brainstorm: Tech conference in Pasadena, California.

The need for cities that use less energy is clear. Although cities occupy just two per cent of the world's geography, they account for 75 per cent of the world's greenhouse gas emissions, according to Clinton Climate Initiative (CCC) chairman Ira Magaziner. Cisco Systems CTO Padmasree Warrior noted that there will be 100 new cities with populations of more than one million people by 2025.

But while technology has the best potential for allowing society to maintain its standard of living in a sustainable way, the industry isn't necessarily set up to provide such technology.

"We're not there yet as an industry," said Sun Microsystems CTO Greg Papadopoulos. "Our business models are built on complexity."

Technology is also built based on frequent upgrade cycles and getting value from disposability of products. "There's a tension there," he said. "It's going to be a lot harder than you at first think."

Papadopoulos pointed to home automation as an example where the tech industry has failed to recognise the different standards needed in new markets.

"We've failed pretty miserably at that so far," he said. "They are complex and they don't work well. If we follow that model we will fail and we will be cursed."

CEO of resource management software company Hara, Amit Chatterjee, said that the focus now should be on changes that can be made without major technology shifts, giving solar and other low-carbon technologies a chance to mature.

"There is a unique opportunity to focus on lo hanging fruit or fruit that's on the ground," Chatterjee said. "That is where we need to start. Insulation is a huge win for the US well before we get to solar panels."

Composting locally, he added, creates compressed natural gas that can fuel vehicles.

Chatterjee said that going after the "quick wins" could cut 30 per cent of our carbon footprint.

Cutting energy use can also create jobs, the panellists agreed. But only if the right economic incentives are there, such as putting a price on carbon use.

CCC's Magaziner said awareness of the issues is improving, but that that isn't enough.

"What we really need is action," he said. "The next three, four, five years are going to be critical."

Original article: Can IT help build smart cities? from CNET News.com