The World Bank adopted a new Climate Change Action Plan that will boost financing aimed at reducing emissions to align its policies with the Paris climate agreement, the bank said on Friday.

"Our collective responses to climate change, poverty and inequality are defining choices of our age," World Bank President David Malpass said in a statement announcing the decision.

"To deliver on our twin goals of reducing poverty and boosting shared prosperity, it is critical that the World Bank Group helps countries fully integrate climate and development."

The development lending organisation's plan will ensure that 35 per cent of overall World Bank financing over the next five years will have climate "co-benefits", including 50 per cent of financing through its lending and international development bodies going to support adaptation and resilience.

That is an increase from an average of just 26 per cent with climate benefits from 2016 through 2020.

The bank also pledged to align new operations with the objectives of the Paris Agreement by July 2023.

The move comes in the wake of US President Joe Biden's announcement to rejoin the Paris Climate Agreement, reversing the decision of his predecessor Donald Trump to withdraw from the pact.

The United States is the world's second-biggest carbon emitter after China and the biggest shareholder of the World Bank.

The bank also will develop new metrics to measure greenhouse gas emissions, assist countries in developing national climate strategies, and support a "just transition" out of coal production that includes job-training skills for workers in the sector.

The plan aims to make the World Bank's operations "climate compatible", said Stephane Hallegatte, lead economist for the World Bank's climate group.

"It's really important because what we don't want is to use 35 per cent of our resources on climate and to have the rest of actions completely disconnected and not even looking into the questions," Hallegatte said.

"The goal has been to mainstream completely the climate questions into development and that's what the Paris Accord alignment means."