Yesterday, as part of the city’s annual St. Patrick’s Day celebration, Chicago poured green coloring in the Chicago River, turning the waterway, which feeds directly into Lake Michigan, a bright chartreuse. Ironically, last Wednesday, a driver for the Dave Matthews Band pleaded guilty to polluting the Chicago River in an August incident. In the city’s defense, instead of food coloring, Stefan Wohl dumped human waste into the river (and onto a very unfortunate tour boat). Wohl was fined and given probation and community service. The DMB has already donated $100,000 to non-profit groups who maintain the health of the river in penance for their driver’s sad drive-by.