Since a high of $147 a barrel in July, the price of oil has dropped like a stone. It’s now about $45 a barrel. Some oil economists say dollar-a-gallon gasoline is possible in the US some time next year. That sounds like good news, but it’s the product of a global recession, which the World Bank today called the worst since the Great Depression. Would Americans jump back into gas-guzzling SUV’s? What about energy independence and alternative fuels? Should gasoline taxes be increased to combat global warming and promote international stability?