President Bush has tapped William L. Wehrum Jr., to head the Environmental Protection Agency office in charge of regulating air pollution. Wehrum, whose nomination was announced Feb. 27, has been acting assistant administrator in EPA’s office of air and radiation. He has support, but faces criticism from environmentalists’ allies, such as Sen. Barbara Boxer (D-Calif.). She calls Wehrum “a dedicated supporter of regulations that have undermined air quality....”