United in Science 2023. Sustainable development edition. A multi-organization high-level compilation of the latest weather-, climate and water-related sciences and services for sustainable development
Publication year
Resource type
UNCCD Library
Material Type
ebook
Key messages
• Total carbon dioxide (CO2) emissions from fossil fuels and land use change remained high in 2022 and the first half
of 2023. Fossil fuel CO2 emissions increased 1% globally in 2022 compared to 2021, and global average concentrations
continued rising through 2022 and the first half of 2023.
• The years from 2015 to 2022 were the eight warmest on record, and the chance of at least one year exceeding the
warmest year on record in the next five years is 98%.
• It is estimated that current mitigation policies will lead to global warming of around 2.8 °C over this century compared
to pre-industrial levels. Immediate and unprecedented reductions in greenhouse gas (GHG) emissions are needed to
achieve the goals of the Paris Agreement.
• Total carbon dioxide (CO2) emissions from fossil fuels and land use change remained high in 2022 and the first half
of 2023. Fossil fuel CO2 emissions increased 1% globally in 2022 compared to 2021, and global average concentrations
continued rising through 2022 and the first half of 2023.
• The years from 2015 to 2022 were the eight warmest on record, and the chance of at least one year exceeding the
warmest year on record in the next five years is 98%.
• It is estimated that current mitigation policies will lead to global warming of around 2.8 °C over this century compared
to pre-industrial levels. Immediate and unprecedented reductions in greenhouse gas (GHG) emissions are needed to
achieve the goals of the Paris Agreement.
Keywords
science and research
climate change
SDGs targets
land use
greenhouse gases
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