The global market for clean technologies could exceed $23 trillion by the end of the decade, offering profitable opportunities to oil and gas producers, US Deputy Secretary of Energy David Turk said on Monday at the 23rd World Petroleum Congress.

“That’s ‘trillion’, with a T,” Turk said during his Opening Keynote address at the prominent triennial oil and gas industry event, hosted this time by Houston.

That means huge opportunities for your companies, for your workers, in geothermal and carbon capture and advanced nuclear logistics.”