[BadBoyBenny]

How does that suggest it is not a fact? If the title was the case for global warming it would be different, but the case of global warming clearly implies one of the follow six definitions of the word case.

# An instance of something; an occurrence; an example: a case of mistaken identity. See Synonyms at example.
# An occurrence of a disease or disorder: a mild case of flu.
# A set of circumstances or a state of affairs; a situation: It may rain, in which case the hike will be canceled.
# Actual fact; reality: We suspected the walls were hollow, and this proved to be the case.
# A question or problem; a matter: It is simply a case of honor.
# A situation that requires investigation, especially by a formal or official body.