Vitamin "O": America's Healthy "Addiction" to Oil  By Alex Epstein   Every day, you use an average of three gallons of oil. This is a very, very good thing. That is the radical message of "Vitamin O," a 30-minute speech by Alex Epstein that defends our so-called addiction to oil as vital to our lives and happiness, and debunks myths associated with our "addiction to oil": that we will run out of oil, that foreign oil causes terrorism and creates dependence, that oil spills and climate change will destroy our environment, and that oil can be replaced by "clean energy."   Following his speech, Mr. Epstein will answer questions on oil and the future of energy—from sustainability to energy independence to climate change.