Already, greenhouse gas levels in the atmosphere are high enough to guarantee climate disruption for decades if not centuries, scientists warn in a report from the Intergovernmental Panel on Climate Change. WATCH | Some climate change impacts 'irreversible' now, says UN climate panelSome climate change impacts 'irreversible' now, says UN climate panel World 1:16 The world must act to stop climate extremes from getting worse, says a new report by the Intergovernmental Panel on Climate Change. "We are now committed to some aspects of climate change, some of which are irreversible for hundreds to thousands of years," said IPCC co-author Tamsin Edwards, a climate scientist at King's College London. Summertime sea ice atop the Arctic Ocean will vanish entirely at least once by 2050, under the IPCC's most optimistic scenario. (Lucas Jackson/Reuters)While Arctic sea ice levels vary throughout the year, the average lows during summer have been decreasing since the 1970s and are now at their lowest levels in a thousand years.

Source: CBC News August 09, 2021 08:48 UTC