Radical emissions cuts combined with some atmospheric carbon removal are the only hope to limit global warming to 1.5 °C, scientists warn.
that the negotiations to finalize the report bogged down as government delegates hashed out perennial arguments over climate mitigation. In particular, negotiators for India raised questions about emissions scenarios in the report, arguing that they assume too much action on the part of developing countries and do not adequately reflect questions of equity and responsibility. Negotiators for Saudi Arabia scrutinized language related to carbon-capture technologies and the future of fossil fuels.
“Despite more mitigation efforts by more governments at all scales, emissions continue to increase,” says Karen Seto, a geographer at Yale University in New Haven, Connecticut, and a coordinating lead author on the report. “We need to do a lot more, and we need to do it quickly.”• This is one of the most stringent warnings yet from the IPCC. The message? Time has almost run out.
• For countries to achieve the net-zero emissions goals that they have set, dialling back emissions won’t be enough — they will also need to extract carbon dioxide from the atmosphere. This will offset residual greenhouse-gas emissions from sectors that are harder to clean up, such as industry or aviation.
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