Authorities will start checking energy consumption and carbon dioxide (CO2) emission levels of buildings in the capital during a monitoring trial in October, an official has said.

City deputy for spatial planning and environment Oswar Muadzin Mungkasa said the trial was part of an attempt to reduce electricity and water usage and reduce carbon dioxide (CO2) by 30 percent in the capital by 2030.

"We are heading there slowly. It’s a process. If we don’t start now, when will we?" he added as quoted by beritajakarta.com on Wednesday. "The most important thing is, is that the building occupants must change their behavior to save energy."

Oswar also said that energy consumption in three city-owned buildings would be watched, with the Jakarta administration set to install energy monitoring devices in the buildings.

The buildings are Blok G in the City Hall compound, the Cipta Karya public works office, the spatial planning and land agencies and D building at the Central Jakarta municipality office, all in Central Jakarta.

He said 800 to 1,000 buildings in the capital had yet to apply the green building concept.

Meanwhile, the division head of Jakarta's Industry and Energy Agency, Maharani Dian, said her office was preparing a device called dashboard monitoring and its software.

"This device can monitor electricity consumption in real time and we will learn which buildings consume energy the most efficiently," she said. (agn)