How to slow down global warming? In the third part of their report, published this Monday, April 4, 2022, the IPCC experts present the various possible scenarios for reducing CO2 emissions, breaking down the possibilities by major sector (energy, transport, industry, agriculture, etc.). Issues of social acceptability and the place of technologies such as carbon capture and storage are also detailed in the report. In its report, the IPCC believes that we are "at a crossroads". "The decisions we make now can ensure a livable future. We have the tools and the know-how to limit warming," said Hoesung Lee, the chairman of the expert group to Le Monde.

The Intergovernmental Panel on Climate Change (IPCC) published this Monday, April 4, 2022 the third installment of its report, detailing this time the possible solutions to limit global warming and its already devastating impacts. In the first part of its report published in August 2021, the IPCC pointed to the acceleration of global warming, predicting that the threshold of + 1.5 ° C compared to the pre-industrial era could be reached already around 2030. The second, at the end of February, painted a bleak picture of past, present and future impacts on people and ecosystems, emphasizing that delaying action reduces the chances of a "livable future".

How can we slow down global warming according to this report?

- Investing to limit temperature rise "is worth it"

"Reducing our emissions is an investment that, in the long run, is worth it," the IPCC said, pointing out that the cost of low-carbon technologies "has fallen continuously since 2010. The experts cite solar energy, whose cost has dropped by 85% between 2010 and 2019, wind power (-55%) or lithium-ion batteries (-85%).

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- Compensating for residual emissions by "carbon dioxide capture"

To limit warming to 1.5°C compared to the pre-industrial era, the world must achieve carbon neutrality by 2050 (2070 for a limitation of warming to 2°C). To achieve this, in addition to "substantially" reducing our emissions, the experts recommend deploying "carbon dioxide capture devices" to "offset residual emissions". They believe that this use of CO2 capture technologies is "unavoidable". Specifically, the IPCC refers to the establishment of natural carbon sinks, through reforestation and changes in soil practices, as well as artificial solutions to capture and store CO2.

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- Reducing funding for fossil fuels

The transition will have to be accompanied by a transition in financial means. The IPCC estimates that "private and public financial flows to fossil fuels are still greater than those for adaptation and mitigation of climate change" and that funding to limit global warming should be "three to six times greater than current levels" in order to achieve the objectives of the Paris Agreement.

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- Capitalizing on "untapped potential" in all sectors"

The report details emission reduction paths for each sector. Having the right policies, infrastructure and technologies to change our lifestyles and behaviors can lead to a 40 to 70 percent drop in greenhouse gas emissions by 2050," says Priyadarshi Shukla. So there is a lot of untapped potential."

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