Global carbon pricing can “kill two birds with one stone,” said Ngozi Okonjo-Iweala, director general of the WTO.

Pricing can lower pollution and provide governments with revenue, she said at the Innovate4climate conference.

Imposition of carbon prices around the world needs “to be less fragmented,” she said.

Carbon border adjustments are complicated to implement and the WTO is looking into them, including whether they may discriminate unfairly.

Nations should not use the push for greener trade as an excuse to fail to implement carbon pricing. “There are some challenges ahead of us,” she said.

(Smooths a typo on July 22, 2021)