On June 6, 2011, the Environmental Protection Agency (EPA) issued its latest comments and rating on the State Department's Supplemental Draft Environmental Impact Statement (SDEIS) for the Keystone XL project, a major new oil pipeline being developed... Read More
Heavier crudes are, by definition, more viscous. The also contain greater amounts of sulfur, which must be removed because of the adverse impact of sulfur on various catalysts used in the refining process. The sulfur content of fuel is also controlled... Read More