The stark disparity in vaccine rates between rich and poor countries serves as an example for how the planet reacts to another global challenge: averting climate change's worst consequences.

"It's about a desire to redistribute wealth in both situations," Rohini Pande, a Yale University economist, said.

The US has yet to deliver on its pledge to generate $100 billion a year for green initiatives.

The United States is yet to make good on its pledge to generate $100 billion a year for renewable infrastructures such as solar farms and mangrove regeneration. The planet is seeing a worldwide economic collapse as a result of the economic downturn.

For world leaders, the next two weeks will be crucial in terms of climate change. In June and July, the UN's 7 and the 20 will meet. Climate talks led by the United Nations will take place in Glasgow in November. These talks will decide whether the planet will limit warming, which is already causing issues. Christiana Figueres, a former US climate negotiator, says, "We will not have a good result at COP26."

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