The G7 leaders get down to business, taking on climate change and the pandemic.

To varying degrees, the member nations, all large wealthy democracies, will be looking to create a united front on tackling the world’s biggest issues. That unity was notably lacking under President Donald J. Trump, who disdained traditional allies and alliances, opposed efforts to fight global warming, was protectionist on trade, wanted a harder stance on China than the other members and wanted to go easier on Russia.

Now, under Mr. Biden, the biggest and most powerful member of the club has moved back toward consensus positions, though conflicts remain. He has rejoined the Paris climate agreement, European and American negotiators are close to resolving trade and tariff disputes, and the G7 nations — the United States, Germany, Japan, France, Italy, Canada and Britain, this year’s host country — and the European Union have made major commitments to increasing supplies of coronavirus vaccines to developing countries.

The G7 meeting began on…

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