Sentences with «to be attributable to human activities»
... past climate changes were natural in origin (see FAQ 6.1), whereas most of the warming of the past 50 years is attributable to human activities. (drtimball.com)
As an alternative, the researchers propose that countries base their policies on a new kind of index: How much current global warming is attributable to human activity. (psmag.com)
I suspect that part of the observed surface warming will ultimately be attributable to human activity. (michaelcrichton.com)