A fine example is here, in Sorry Bernie, Science Doesn't #FeeltheBern in the apparently misnamed RealClearScience blog:
Additionally, it should be noted that while human activity is largely responsible for climate change, the IPCC AR5, which is seen as the global consensus on climate change, is more measured in its conclusion. It writes (PDF, page 5): "More than half of the observed increase in global mean surface temperature (GMST) from 1951 to 2010 is very likely due to the observed anthropogenic increase in greenhouse gas concentrations." (By "very likely," the IPCC means 90+% confident.) More than half is certainly a lot, but it also implies that a substantial proportion of climate change is due to other factors.But see, no it doesn't. The best estimate of the anthropogenic component is over 100%.