Five things to know about the new UN report on climate change:
If global ice melt continues at its current pace, 70% of emperor penguins could die by 2050, and the population may be completely erased by 2100.GENEVA -- The U.N.-appointed Intergovernmental Panel on Climate Change published a new report Monday summarizing the latest authoritative scientific information about global warming. Here are five important takeaways.
Scientists say that only a fraction of the temperature rise recorded since the 19th century can have come from natural forces.Almost all countries have signed up to the 2015 Paris climate accord that aims to limit global warming to 2 degrees Celsius — and ideally no more than 1.5 degrees Celsius — by the year 2100, compared to the late 19th century.
The report's 200-plus authors looked at five scenarios and concluded that all will see the world cross the 1.5-degree threshold in the 2030s — sooner than in previous predictions. Three of those scenarios will also see temperatures rise 2 degrees Celsius above the pre-industrial average.The 3,000-plus-page report concludes that ice melt and sea level rise are already accelerating. Wild weather events — from storms to heat waves — are also expected to worsen and become more frequent.
Further warming is “locked in" due to the greenhouse gases humans have already released into the atmosphere. That means even if emissions are drastically cut, some changes will be “irreversible" for centuries, the report said.
Scores of scientists provide regular reports on a range of aspects of global warming that governments draw on when discussing what countries can contribute to curb greenhouse gas emissions and adapt to the impacts of climate change.
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