In Pics | G7 vows action on Covid vaccines, climate change

The Group of Seven leaders aim to end their first summit in two years with a punchy set of promises Sunday, including vaccinating the world against coronavirus, making huge corporations pay their fair share of taxes and tackling climate change with a blend of technology and money.

U.K. Prime Minister Boris Johnson, the summit's host, wanted the three-day meeting to fly the flag for a "Global Britain," his government's initiative to give the midsized country outsized influence when it comes to global problem-solving.

European Union leaders and U.S. President Joe Biden voiced concerns about problems with new U.K.-EU trade rules that have heightened tensions in Northern Ireland.

At the G-7, Johnson described Biden as a "breath of fresh air." French President Emmanuel Macron, after speaking one-to-one with Biden, said, "It's great to have a U.S. president part of the club and very willing to cooperate."

Britain's Prime Minister Boris Johnson greets France's President Emmanuel Macron as their spouses, Carrie Johnson and Brigitte Macron stand at the side during arrivals for the G7 meeting at the Carbis Bay Hotel in Carbis Bay, St. Ives, Cornwall, England.

Climate activists hold a banner as they begin to march during a demonstration in Falmouth, Cornwall, England, during an action by NGOs.

German Chancellor Angela Merkel and British PM Borish Johnson during a bilateral meet in Cornwall.