The United Nations urges countries to have net zero emissions
- Climatologists believe that net zero emissions by 2050 will no longer be enough to avoid the effects of global warming
The warning has been issued in a new report of the Climate Crisis Advisory Group on August 26, 2021. The team is made up of 15 leading climate scientists from all over the world, including Sir David King, the former chief scientific adviser of the United Kingdom, who serves as the chair.
The new report, called "The Last Wake," is based on the latest report of the Intergovernmental Panel on Climate Change (IPCC) working group and outlines the latest physical sciences on the past, present, and possible changes in the Earth’s climate in the future. Using IPCC's insights, the Climate Crisis Advisory Group calculated that even if the world achieves net zero by 2050, there is only a 50% chance that the global temperature rise will be limited to 1.5 degrees. The report pointed out that it may even exceed the 1.5 degree mark by 2030. 1.5 degrees is the most ambitious goal of the Paris Agreement. As the IPCC said, every degree above this limit will have terrible effects on ecosystems, communities, and the global economy.
The report believes that if countries and companies work together to achieve net negative emissions by the middle of this century at the latest, the possibility of limiting the temperature rise to 1.5 degrees will be much greater. This requires reducing internal emissions as much as possible, and then capturing emissions equivalent to the remaining emissions. The Climate Crisis Advisory Group stated that it believes that both natural-based solutions and man-made "negative emission" technologies can play a role in achieving a net negative emission world-but it believes that both options are affected by the lack of investment. Support and in-depth research.
"If all feasible greenhouse gas removal technologies are deployed on a large scale, there is a reasonable opportunity to store 3-40 billion tons of carbon dioxide each year-lower than the current total annual emissions." The report pointed out. It believes that "only technologies that can capture and store at least 1 billion tons of carbon dioxide each year should be considered, because scalability is essential to any response to the current crisis."
The report points out that other key considerations are the cost of carbon removal systems, the need to protect diversity, and the importance of ensuring that projects are delivered in a “fair” manner to protect and empower the most marginalized groups (including indigenous communities). With this in mind, it tends to be based on natural solutions. In addition to reducing and eliminating emissions, the report also provides reasons for so-called climate restoration. Climate restoration actions include refreezing the poles and glaciers of the earth, slowing future ice melting and stabilizing sea levels. The report acknowledges that research on how to carry out these actions is still in its early stages.
The report urged the 25 countries that jointly pledged to spend $30 billion on research and deployment of technologies to reduce and eliminate emissions or repair the climate at COP21 in Paris to provide more details on the funds allocated so far and future spending plans. This will solve the R&D and funding gap to some extent, and can set an example for other countries.
"It is clearer than ever that there is no remaining carbon budget, and there is really no room for maneuver. This is our moment now or forever." Sir David King said. "The world will focus on the gathering of governments and policy makers at COP26 in November 2021. They must put the future of mankind first.
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"If our leaders do not take immediate and coordinated actions to deal with the climate crisis, the latest IPCC AR6 report is the most reliable assessment of the global disaster we are facing so far."Editor/XuNing