Climate varies naturally and the issue is if we can detect a human - induced change of climate in spite of the «noise» due to the natural variability. (heatisonline.org)
The key issue is of course, if a human induced change of climate can be detected. (heatisonline.org)
«The main point is that the 2C target — which is almost out of reach now, or quickly becoming out of reach — is itself a dangerous target because it leads to a world that is greatly destabilised by rising sea levels and massive changes of climate patterns in different parts of the world,» said Professor Jeff Sachs, director of the Earth Institute at Columbia University, one of the PLoS paper's authors. (theguardian.com)