| Comment | Fuel combustion for process energy causes greenhouse gas emissions
from oil refineries, and lower-quality oil requires more intensive
processing and more energy. This analysis compares process
intensity and energy with oil input quality across U.S. refining
districts during 2003-2007. Refining lower-quality oils caused a
large increase in refinery energy and emissions intensity, and
could cause a very large further increase in emissions/barrel if
the ongoing shift to lower-quality oil refining continues. Limiting
the worsening quality of refinery oil inputs is critical to our
environmental health.
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