A climate shake-up is jolting one of the most progressive cities in Mass.

A climate shake-up is jolting one of the most progressive cities in Mass.

THE MAYOR OF an affluent, liberal Boston suburb that has in recent years raced to reach the top of the climate policy mantle is shaking up his city’s approach to the issue. The question is whether, in the end, it’s more of a mundane municipal reorganization or a sign of retreat in Newton, one of the state’s most climate-forward communities. Marc Laredo, who assumed office as mayor of Newton earlier this year, unveiled a series of personnel and o…