It is a pivotal moment, not only for the President but for a world with little time to spare in resolving a climate crisis that is right now wreaking havoc.
Already, Biden has been hampered somewhat by infighting among Democrats and entrenched fossil fuel interests, which have forced him to scale back some of the most audacious aspects of his climate agenda. Deep differences between world leaders also persist over money, national interests and responsibility.
The proposals currently pending in Congress, which Biden said Sunday he believes could pass this week, reflect historic investments in cutting the greenhouse gas emissions that contribute to global warming. And on the day before the summit began, leaders at the Group of 20 in Rome endorsed a commitment to keep the average global temperature rise to 1.5 degrees Celsius, a symbolic gesture that nonetheless represents progress.

