Detroit Free Press: With runaway energy prices stirring public debate, environmental issues that were on the back burner a year ago have leapfrogged into the limelight in the presidential campaign. Issues like whether to open new parts of the oceans to offshore drilling or build new coal and nuclear plants, and how alternative energy ties in with climate change have become hot topics in the race between presumptive presidential nominees Sens. Barack Obama, D-Ill., and John McCain, R-Ariz. “The …