Arctic sea ice may vanish in summers this century even if governments achieve a core target for limiting global warming set by almost 200 nations in 2015, scientists say. Arctic sea ice has been shrinking steadily in recent decades, damaging the livelihoods of indigenous peoples and wildlife such as polar bears while opening the region to more shipping and oil and gas exploration. Under the 2015 Paris Agreement, governments set a goal of limiting the rise in average world temperatures to well below two degrees Celsius above pre-industrial times, with an aspiration of just 1.5C.
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