Hong Kong owner and manager Wah Kwong has revealed a near-doubling of CO2 emissions for its more active fleet in 2021.

But the company, which operates tankers, gas carriers and bulkers, also said its fuel efficiency had improved from the previous year.

The 21 vessels in the owned fleet, including two capesizes and three VLCCs, consumed 6.44m GJ of fuel, while the 46 managed ships used 9.33m GJs.

CO2-equivalent emissions from voyage charters of owned ships reached 56,930 tonnes in 2021, up from 29,563 tonnes in 2020.

“The emissions from our vessels have increased from last year partly due to the increase in the number of voyages and performance of longer voyages,” Wah Kwong said in its latest ESG report.

But the company achieved a reduction in its annual efficiency ratio (AER) figure, which is calculated by dividing a vessel’s annual carbon emissions by its annual dwt/miles.

This fell 6% year-on-year to 3.26 grams per CO2/dwt-miles.

The company offset 57,370 tonnes of CO2-equivalents through its carbon credit partnership with China Light & Power (CLP).

Executive chairman Hing Chao said: “We are consistently taking steps to reduce our environmental impact.”

New investments planned

“We continue to offset carbon emissions from our owned fleet’s voyage charter activities as well as from emissions from our office crew and executive travel,” he added.

Chao also said the company is actively seeking potential investments in the renewable energy space to support and promote new sustainable technologies.

In November, Greek owner Star Bulk Carriers’ said its AER carbon intensity had increased as charterers asked its bulkers to speed up.