Emission trading is a well-established method for managing certain kinds of environmental problems. Also called cap-and-trade, emission trading was used to eliminate lead from gasoline in the 1980s, ...

Causes of Intractable Migraine Neurologists are still trying to pinpoint exactly why certain people (less than one percent of those with chronic migraine) experience these treatment-resistant and ...

ST. PAUL, Minn. (AP) — One word carries a lot of weight in Minnesota health officials' decision to expand its medical marijuana to pain patients: intractable. The state's definition of what qualifies ...