Belém, Brazil — The Amazon rainforest is a poster child for the perils of climate change. Deforestation and warming temperatures threaten to push the iconic forest past its limits.
So Belém, in the heart of the Amazon, was a momentous place for global climate leaders to meet on the 10th anniversary of an international pledge to try to rein in climate change. Some 196 nations signed that pledge, known as the Paris Agreement, promising to collectively reduce their greenhouse gas emissions enough to hold global warming to 1.5 degrees Celsius relative to preindustrial times by 2100.
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