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Limiting global warming to 1.5°C will require “far-reaching and unprecedented changes” to human behaviour, according to a United Nations scientific panel, launching a special report on Monday that finds some of the actions needed are already under way, but must be dramatically increased.
The IPCC, or Intergovernmental Panel on Climate Change (IPCC), issued the report from Incheon, Republic of Korea, where for the past week, hundreds of scientists and government representatives have been poring over thousands of inputs to paint a picture of what could happen to the planet and its population with global warming of 1.5°C (or 2.7 degrees Fahrenheit).
“One of the key messages that comes out very strongly from this report is that we are already seeing the consequences of 1°C of global warming through more extreme weather, rising sea levels and diminishing Arctic sea ice, among other changes,” said Panmao Zhai, Co-Chair of one of the IPCC Working Groups.
The landmark Paris Agreement adopted in December 2015 by 195 nations at the 21st Conference of the Parties to the UN Framework Convention on Climate Change (UNFCCC), included the aim of strengthening the global response to the threat of climate change by “holding the increase in the global average temperature to well below 2°C above pre-industrial levels and pursuing efforts to limit the temperature increase to 1.5°C above pre-industrial levels.”
Tweeting shortly after the report was launched, UN Secretary-General António Guterres said that it is not impossible to limit global warming to 1.5°C, according to the report. “But it will require unprecedented and collective climate action in all areas. There is no time to waste.”
Petteri Taalas, Secretary-General of the World Meteorological Organisation (WMO), said on Monday in Geneva that there was “extreme urgency” needed on the part of Paris Agreement signatories, and “so far the progress hasn't been good enough” to keep temperature rises below even 2°.
“Climate change is already visible and it is having an impact on human beings and ecosystems all around the world...With 2° we will have ice-free summer in the Antarctic every year, but with 1.5° we would see that, only every 100 years," he said, giving one example of how the world's weather dramatically changes per half-degree.
“There will be 420 million people less suffering because of climate change if we would be able to limit the warming to 1.5°C level and we have certain areas in the world which are extremely sensitive,” Professor Taalas said. “Small island states, (the) Mediterranean region and also sub-Saharan Africa is already suffering and will suffer more in the future.”
It is still possible to limit global warming to 1.5°C, the WMO official continued, “but we should change many things how we run our everyday business today”.
Also in Geneva, a UN rights expert warned that failing to do more to address climate change risked “locking in decades” of grave violations.
“Climate change is having - and will have - devastating effects on a wide range of human rights, including rights to life, health, food, housing, and water, as well as the right to a healthy environment,” said David Boyd, Special Rapporteur on human rights and the environment.
“The world is already witnessing the impacts of climate change — from hurricanes in America, heat waves in Europe, droughts in Africa to floods in Asia.”
The report highlights a number of climate change impacts that could be avoided by limiting global warming to 1.5°C compared to 2°C, or more.
For instance, by 2100, global sea level rise would be 10cm lower with global warming of 1.5°C compared with 2°C.
Moreover, coral reefs, already threatened, would decline by 70-90 percent with global warming of 1.5°C, whereas virtually all would be lost with 2°C, according to the report.
“Every extra bit of warming matters, especially since warming of 1.5°C or higher, increases the risk associated with long-lasting or irreversible changes, such as the loss of some ecosystems,” said Hans-Otto Pörtner, Co-Chair of IPCC Working Group II.
“Limiting warming to 1.5°C is possible within the laws of chemistry and physics but doing so would require unprecedented changes,” said Jim Skea, Co-Chair of IPCC Working Group III.
With that in mind, the report calls for huge changes in land, energy, industry, buildings, and transportation-use and across cities everywhere. Global net emissions of carbon dioxide would need to fall by 45 per cent from 2010 levels by 2030, and reach "net zero" around 2050.
Allowing the global temperature to temporarily exceed or ‘overshoot’ 1.5ºC would mean a greater reliance on techniques that remove CO2 from the air to return global temperatures to below 1.5°C by 2100.
But the report warns that “the effectiveness of such techniques are unproven at large scale and some may carry significant risks for sustainable development.”
“Limiting global warming to 1.5°C compared with 2°C would reduce challenging impacts on ecosystems, human health and well-being, making it easier to achieve the United Nations Sustainable Development Goals (SDGs),” said Priyardarshi Shukla, Co-Chair of IPCC Working Group III, referring to the 17 Goals adopted by UN Member States three years ago to protect the planet and ensure that all people enjoy peace and prosperity by 2030.
The new report will feed into a process called the ‘Talanoa Dialogue,’ in which parties to the Paris accord will take stock of what has been accomplished over the past three years. The dialogue will be a part of the next UNFCCC conference of States parties, known by the shorthand COP 24, which will meet in Katowice, Poland, this December.
SOURCE: UN NEWS CENTRE/PACNEWS
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