The Marshalls is the only Pacific nation invited to US President Joe Biden's summit table. President David Kabua, New Zealand Prime Minister Jacinda Ardern and 38 other leaders, including Australia's Prime Minister Scott Morrison, have been summoned by the American leader to address the climate crisis. People of Kiritimati coral atoll building a stone seawall to struggle against sea level rise cause by global warming. Photo: AFP To mark International Earth Day today, Biden is also calling for a united front. Since taking up office in the White House in January, Biden has made clear he wants to reassert US leadership on the world stage, including on climate change.