It's believed that Exxon knew about the impact its business had upon the environment as far back as 1977. Rockefeller descendant David Kaiser launched a broadside against the company in November, outlining the charges. He claims that Exxon concluded that we were sliding toward a carbon catastrophe by 1980 but used paid scientists to muddy the consensus around carbon dioxide's impact.
An Exxon spokesperson told Reuters that it was "reviewing the decision" of the court, in order to "determine next steps." As reported by the Boston Globe, Exxon has also launched two lawsuits at Healey directly, claiming that her actions are politically motivated. In this particular case, however, the court was unconvinced by the line that Healey was acting arbitrarily or capriciously against the oil company.
It may be a while before we know the contents of the documents that will soon be on their way to Healey's office. But if they do contain evidence that Exxon Mobil knew and chose to mislead both the public and its investors -- then it's going to be a fun couple of years.