Increasingly worried about China, G7 leaders first floated plans for the project last year, and are formally launching it now under a fresh title, "Partnership for Global Infrastructure and Investment" while dropping the moniker "Build Back Better World" first coined by Biden during his presidential campaign.

Biden unveiled several specific projects at a G7 side event, joined by leaders from Britain, Germany, Japan, the European Union and Canada, vowing to focus on projects that help tackle climate change as well as improve global health, gender equity and digital infrastructure.

The funds would be raised through grants and federal funds, and by leveraging private-sector investments, Biden said, adding that hundreds of billions of additional dollars could come from multilateral development banks, development finance institutions, sovereign wealth funds and others.

China's Belt and Road Initiative (BRI) scheme, which Chinese President Xi Jinping launched in 2013, involves development and investment initiatives in over 100 countries, with a range of projects including railways, ports and highways.