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Top US and EU representatives on Monday urged other countries to do more in the global initiative towards a greener planet, stressing the world "cannot afford to wait" at a virtual summit hosted by South Korea.
Climate change is a major threat to global growth, with perils ranging from disease outbreaks and declines in crop yields.
But international negotiations on how to tackle it have long been hampered by disagreements over burden-sharing between rich countries that bear far more historical responsibility for climate change and the rising giants that are now among the world's biggest polluters.
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