ThePinellas County (Fla.) School District's 700 buses will rumble to life with the start of a new academic year Tuesday, carrying liquid gold in their bellies. Their precious cargo — diesel fuel — averaged $4.54 a gallon in the Tampa Bay area last week, up from $2.86 a gallon this time last year. The 59 percent increase translates to nearly $1 million in additional cost for the district over the next 10 months. To read The St. Petersburg Times article, click here.