Ah, found it. That was a link to an earlier survey, so I didn't click on that one.it's in the link that you posted
Yes, I can see how that would raise doubt, but the nature of the sample doesnt mean that all 2100 of the articles are suggesting there's no evidence, otherwise theyd be rejecting it. It's just that the outroght causes are not the discussed in the article.
Take the ones where the causes are discussed it's 888-4 in favour of endorsement of human activity being the driver.