Great Lakes Echo: Last week, as much as 1,600 gallons of oil spilled into Lake Michigan from the BP refinery in Whiting, Indiana, 20 miles from Chicago. After a week-long cleanup, authorities say they have found no further trace of spilled oil in the area. However, the political ramifications of the spill are likely to remain long after this incident. The BP refinery processes oil from tar sands found in Canada. Tar sands contain a thick petroleum thatās gaining popularity as a new energy source. New technology...