In calculating a company's greenhouse gas emissions, which category covers direct emissions such as fuel combustion and process gas emissions at its own fabs?

Answer: C. Scope 1

Greenhouse gas emissions are calculated in categories: direct emissions by the company itself (Scope 1), indirect emissions from purchased energy such as electricity (Scope 2), and emissions across the whole supply chain, such as raw material procurement and product use (Scope 3). In semiconductor fabs, emissions of process gases such as PFCs fall under Scope 1.