This article was investigative, balanced, and sufficiently sourced. No set of bias was placed, as this article acted as more of an informational piece. Four stars is the correct rating for two reasons: this specific subject of carbon credits and climate change could be confusing to someone without the knowledge, and there should have been more supplemental information on published studies to make the claim a bit clearer and understandable. Overall, this is a trusted piece of information, and it provides good insight on the topic if you are interested in doing further research.