31.   Instead of toughening standards for federal agencies, enforcement officials are worried pollution standards are being softened.

32.   It will meet state pollution standards four years ahead of schedule and federal rules five years early.

33.   Local officials say much of it comes from the San Francisco area, and have sued to tighten auto pollution standards there.

34.   More than a decade ago, in amending the Clean Water Act, Congress gave Indian tribes the same authority as states to set water pollution standards.

35.   New York City is classified in the second worst category that the agency uses for air pollution standards.

36.   On Monday, a more diverse group will try again to bring other states around to a California pollution standard.

37.   One impetus is a realization that pollution standards are likely to become more stringent.

38.   Researchers found that the risk of death was higher even in areas that met federal pollution standards.

39.   Rhode Island had asked the US Environmental Protection Agency to declare the state in compliance with federal pollution standards before this summer.

40.   Renault launched a new line of trucks in the fall, which boosted expenses, as did new European pollution standards.