How many world leaders were featured in the Biden administration's 2021 Leaders' Climate Summit?

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The Biden administration’s 2021 Leaders’ Climate Summit featured 40 world leaders.

President Joe Biden convened the virtual summit on April 22–23, 2021, deliberately placing it on Earth Day. The meeting was designed to encourage stronger national climate targets and restore high-level U.S. engagement after the country rejoined the Paris Agreement.

The invited participants represented major economies and politically influential countries, including China, India, Russia, Japan, Canada, Brazil and members of the European Union. Leaders used the event to announce or discuss new emissions-reduction goals, clean-energy plans and pathways toward net-zero emissions.

The figure 40 refers to the invited world leaders or heads of government, not every participant in the wider online program. The summit also included officials, experts and other representatives, which is why some accounts describe the broader event as involving more than 40 people. It was separate from the UN climate conference, COP26, held later that year in Glasgow.

Source: Wikipedia · fact-checked Sept. 2026

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