Fossil fuel companies caused $28 trillion in climate damage, study finds. These 5 are tied to the most harm.

Study: Heat caused by emissions from 111 fossil fuel companies cost an estimated $28 trillion between 1991 and 2020 .

Study presents a peer-reviewed method for tying emissions to specific climate harms.

A third of the total cost was attributed to five companies, which can be tied to more than $9 trillion in climate damage.

"We argue that the scientific case for climate liability is closed," study's authors say.