A blood testconfirmed that shehad an advanced case of Grave's disease, anautoimmune disorder that causes the thyroid gland to swellandproducetoo much of the powerfulhormone.
The renewable fuel standard (RFS) mandates that a portion of the fuel supply be composed of an alternative fuel, in this caseadvanced biofuels (similar to the RFS included in the US Energy Independence and Security Act of 2007, which gradually phases in biofuels over 15 years).