To hold global warming in check requires reducing current emission levels by as much as 70 percent by 2050, compared with 2010 levels, and nearly eliminating such pollution by 2100. (scientificamerican.com)
Accepting the Intergovernmental Panel on Climate Change (IPCC) scenarios provide us with a global carbon budget that will be consumed in 10 — 20 years at current emissions levels, and entail very significant levels of risk. (ecoequity.org)
In the worst case considered — which Wehner notes is not the worst case possible since current emissions levels are already higher — hot temperatures that recently were 20 - year events will become annual occurrences. (newscenter.lbl.gov)