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Biden pollution pledge called 'game changer' as world leaders unite at virtual climate summit

Saying the world must "overcome the existential crisis of our time," U.S. President Joe Biden announced a new goal of cutting U.S. greenhouse gas pollution by 50-52% by 2030 as he kicked off a virtual global summit on climate change with dozens of other world leaders.

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Polar bears live on the edge of the climate change crisis

On Hudson Bay's frigid shores, scientists track polar bears to better understand how the environment is shaping their chances of survival

Amazon wildfires causing spike in children's breathing problems

Amazon wildfires causing spike in children's breathing problems

Wildfires raging in the Amazon rainforest are driving a spike in breathing problems and hospitalizations among children in Brazil, according to a new report.