A skeptic is someone who questions or doubts things rather than easily accepting them. They need evidence or proof before believing in something. Full definition
But such explanations did not satisfy a pair of climate skeptics who also testified yesterday. (scientificamerican.com)
Since I've spent the last 6 + years digging into the smear of skeptic climate scientists and who is behind the smear, I'm not surprised at all. (gelbspanfiles.com)
Soon is a prominent climate change skeptic who has received much of his research funding from the oil and gas industry. (desmogblog.com)