Robber barons and corporate moguls may cringe at Weeks' unperturbed attack of industry, but Wobblies and environmentalists will rejoice. A little man and his small co-workers are happy in their tiny factory, until he gets the expansion bug. They add workrooms, conveyors, and chimneys, but with the growth comes pollution, and belching smokestacks drive all the workers away but one. He bravely knocks down the chimneys and puts up solar panels, keeping the factory running and cleaning up the environment. Barton’s stubby little folks, brightly arrayed in tropically colored work clothes, match the uncomplicated nature of this fable. (Picture book. 3-7)