I agree we are going to need net negative emissions because CO2 levels are already too high (and they will go higher). (centerforcarbonremoval.org)
«The idea of net negative emissions by 2050 is not credible right now,» says Guido Schmidt - Traub, executive director of the Sustainable Development Solutions Network, which is working on plans to eliminate CO2 in national economies. (scientificamerican.com)
Wehner and his co-authors of Chapter 2 of the NCA, which looked at the physical basis for our understanding of climate change, considered seven different future scenarios (including four new ones), ranging from the «do nothing» option to a geoengineering option, which would require an as - yet uninvented technology to take CO2 out of the atmosphere on a global scale, to achieve net negative emissions of greenhouse gases by 2050. (newscenter.lbl.gov)