But this only marked the beginning of a gradual rise in our greenhouse gas emissions. (theconversation.com)
His reading of climate model projections also doesn't mention the persistent uncertainty about how much warming a given rise in greenhouse gas concentrations could produce. (dotearth.blogs.nytimes.com)
The world has never before seen such a rapid rise in greenhouse gases with the present - day configuration of the continents and with large amounts of polar ice. (realclimate.org)