When writing about ideas around which scientific consensus has coalesced, Wikipedia editors should strive to describe those ideas as plainly as possible.

It may be that there are certain parties which dispute the consensus view. It is up to the editors of articles to determine, through careful examination of the sources, how notable the views of these parties are and whether they are relevant to articles on scientific matters. It is important to note that in forming its consensus it is the members of a particular scientific discipline who determine what is scientific and what is questionable science or pseudoscience. Public opinion or promoters of what is considered pseudoscience by the scientific consensus hold no sway in that determination. (See Wikipedia policy and guidelines regarding Undue weight, extraordinary claims sourcing, verifiability, reliability, and dealing with fringe theories.)

Wikipedia should not be among the first to declare scientific consensus. Our guidelines on Reliable sources set the bar high for claiming there is an academic consensus:

A statement that all or most scientists or scholars hold a certain view requires reliable sourcing that directly says that all or most scientists or scholars hold that view. Otherwise, individual opinions should be identified as those of particular, named sources. Editors should avoid original research especially with regard to making blanket statements based on novel syntheses of disparate material. Stated simply, any statement in Wikipedia that academic consensus exists on a topic must be sourced rather than being based on the opinion or assessment of editors. Review articles, especially those printed in academic review journals that survey the literature, can help clarify academic consensus.

Articles that discuss the existence of a controversy (be it scientific, interdisciplinary, popular, political, or religious) should clearly identify proponents of minority views and explain the extent and reasons for their marginalization. It is important that articles which discuss such controversies neither exaggerate nor minimize the proportion of experts in the field who advocate minority views. Moreover, representing the premise of any contrived dispute or artificial controversy (such as Teach the Controversy) as fact gives undue weight to the viewpoint of those who have created the dispute. In cases where the controversy has been created and promoted to further a particular group's goals, describing the goals and manner in which the controversy was created is necessary in order for an article to meet the Wikipedia:Neutral Point of View policy.

In addition to the undue weight clause, the treatment of the scientific consensus is also described in the 'equal validity' and 'pseudoscience' clauses of the Neutral Point of View policy:

The Arbitration Committee also ruled on the presentation of the scientific consensus in Wikipedia:Requests for arbitration/Pseudoscience.