The recent consensus on how much we are contributing range from 80% to 120% due primarily to GHGs.
What the article was about was fooling the reader into believing there's a consensus. Truth is, there is none, and it is extremely hard to know how much human activity plays a role. Anyone who pretend that WE KNOW is a fool. Making a model of the entire earth isn't an easy task.
And the result of the survey of the current science (not people) show almost all of them agree that we are causing the change.
The problem is not the change, but what change. As I wrote, everyone agrees that human activity has consequences. By how much, nobody agrees. Which is why asking such question has very little importance.