. In these 500 ppm CO2-eq scenarios

. In these 500 ppm CO2-eq scenarios, global 2050 emissions levels
are 25-55% lower than in 2010. Scenarios with higher emissions in 2050 are characterized by a greater
reliance on Carbon Dioxide Removal (CDR) technologies beyond mid-century (and vice versa). Trajectories
that are likely to limit warming to 3°C relative to pre-industrial levels reduce emissions less rapidly than
those limiting warming to 2o
C. A limited number of studies provide scenarios that are more likely than not to
limit warming to 1.5°C by 2100; these scenarios are characterized by concentrations below 430 ppm CO2-eq
by 2100 and 2050 emission reduction between 70% and 95% below 2010. For a comprehensive overview of
the characteristics of emissions scenarios, their GHG concentrations and their likelihood to keep warming to
below a range of temperature levels, see Table SPM.1.{Figure SPM.11, 3.4, Table SPM.1}.