The scariest parts of the new climate change report
The scariest parts of the new climate change report
The report by the United Nations' Intergovernmental Panel on Climate Change calls for dramatic and urgent steps to cut emissions to zero by 2050
09 October, 2018, 16:15
However, limiting global warming global warming to 1.5 C would require "rapid, far-reaching and unprecedented changes in all aspects of society". They tell how global warming of more than 1.5°C will be a huge risk and to prevent it we ... that's the whole world ... must halve our emissions in 10 years.
During that historic conference in Paris three years ago, 197 nations (over 170 states and the European Union) had adopted new targets to help curb global warming, but in a controversial move, Donald Trump pulled the U.S. out in June 2017, saying it was "unfair" to this country.
More than 90 authors from 40 countries were involved in leading the report, helped by 133 contributing authors.
Tropical nations most affected by climate asked the UN to create a report showing the difference in impact between a 1.5 degree Celcius (2.7 degrees F) and a 2.0 C (3.6 degree F) increase.
Keeping the 1.5C target would keep the global sea level rise 0.1 metre lower by 2100 than a 2C target, the report states.
The report makes it evidently clear that a 1.5°C world would witness greater sea level rise, increased precipitation and increased frequency of droughts and floods, more hotter days and heatwaves, more intense tropical cyclones, increased ocean acidification and salinity.
The report laid out how the changes to climate, environment and human life would be less devastating and risky if the global temperature rise is contained at below 1.5 degree instead of 2 degree Celsius - the existing primary goal of the Paris Agreement.
"Every extra bit of warming matters, especially since warming of 1.5ºC or higher increases the risk associated with long-lasting or irreversible changes, such as the loss of some ecosystems", the report said.
"Examples of actions include shifting to low- or zero-emission power generation, such as renewables; changing food systems, such as diet changes away from land-intensive animal products; electrifying transport and developing "green infrastructure", such as building green roofs, or improving energy efficiency by smart urban planning, which will change the layout of many cities", the report said.
Global net human-caused emissions of carbon dioxide (CO2) would need to fall by about 45 percent from 2010 levels by 2030, reaching "net zero" around 2050.
The effectiveness of such techniques are unproven at large scale and some may carry significant risks for sustainable development, the report notes.
The review of thousands of scientific papers also said the spread of disease and economic damage and harm to yields of crops will be less severe at 1.5C than 2C, as will the extinction of species.
Preventing an extra single degree of heat could make a life-or-death difference in the next few decades for multitudes of people and ecosystems on this fast-warming planet, an worldwide panel of scientists reported on Sunday.
The IPCC's report, released today (Monday, October 8), shows the impacts of even 1.5° of warming are far greater than previously expected, but also that it's definitely still feasible to hold warming to that level, according to scientific research organisation Climate Analytics. "The next few years are probably the most important in our history", she said.
IPCC is the United Nations body for assessing science related to climate change. But the IPCC report sidestepped questions of feasibility and focused instead on determining what governments, businesses and individuals would need to do to meet the 1.5 °C goal. The Paris agreement committed to limit warming to well below 2 degrees, and pursue the even harder goal to limit it to 1.5 degrees.
Former George Tech atmospheric-sciences professor Judith A. Curry describedthe report's conclusions as the "same old, same old", based on questionable climate models and not "new science or better ways of assessing uncertainty".
We have been warned: There are now only 12 years left for us to stop global warming in its tracks.
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