Relatively clear skies marked the first two days of Summer Davos, but the last day brought a familiar sight to Tianjin: a visible layer of haze.
China's longstanding battle with pollution has become central to discussion about its economic development, and featured prominently at Tuesday's start to the conference.
Experts acknowledged the government's commitment to battling poor air quality, reflected by prevention and control plans for industrial sectors in key regions, but warned that the path to progress was long.
It could be another 10-15 years before blue skies became the norm, Changhua Wu, China director at TIR Consulting, said at a WEF briefing on the issue.
Many recognized the declines in coal consumption—the leading driver behind the country's notorious smog—but pointed to geographical discrepancies that hindered nationwide implementation of hydro, solar or wind power.
Unlike the western and central regions of the country, the east lacked resources for clean energy, underlining the need for an integrated network, pointed out Wang Yimin, secretary-general of the Global Energy Interconnection Development and Cooperation Organization (GEIDCO).