Completely ignoring the facts in question, I'm disappointed in the author of this article. He went from "global warming caused by green house gases" to
The results confirm greenhouse gases produced by human activities
like they were the same thing. Like I said, I don't care if that claim is actually true; but if you're going to make a claim like this is a scholarly article, you should at least provide proof to all parts of your analysis. Then again, I don't know how "scholarly" livescience is; or how scholarly you can be in like 400 words.