Bush administration tightens air pollution standards (AFP via Yahoo! News) The US Environmental Protection Agency announced Wednesday it is tightening federal air pollution standards by setting more stringent ozone limits for the first time since 1997. [News Source]

New air pollution standards hit 25 Indiana counties (The Star Press) A year after finally meeting federal environmental standards for air pollution, Central Indiana is back on the smog list. [News Source]

U.S. Tightens Air Pollution Standards After A Decade (Nasdaq) (RTTNews) - The U.S. Environmental Protection Agency announced a modest tightening of federal air pollution standards by setting more stringent ozone limits for the first time in a decade. [News Source]

U.S. Tightens Air Pollution Standards After A Decade (Nasdaq) (RTTNews) - The U.S. Environmental Protection Agency announced a modest tightening of federal air pollution standards by setting more stringent ozone limits for the first time in a decade. [News Source]

U.S. Tightens Air Pollution Standards After A Decade (Nasdaq) (RTTNews) - The U.S. Environmental Protection Agency announced a modest tightening of federal air pollution standards by setting more stringent ozone limits for the first time in a decade. [News Source]

U.S. Tightens Air Pollution Standards After A Decade (Nasdaq) (RTTNews) - The U.S. Environmental Protection Agency announced a modest tightening of federal air pollution standards by setting more stringent ozone limits for the first time in a decade. [News Source]

U.S. Tightens Air Pollution Standards After A Decade (Nasdaq) (RTTNews) - The U.S. Environmental Protection Agency announced a modest tightening of federal air pollution standards by setting more stringent ozone limits for the first time in a decade. [News Source]

U.S. Tightens Air Pollution Standards After A Decade (Nasdaq) (RTTNews) - The U.S. Environmental Protection Agency announced a modest tightening of federal air pollution standards by setting more stringent ozone limits for the first time in a decade. [News Source]

U.S. Tightens Air Pollution Standards After A Decade (Nasdaq) (RTTNews) - The U.S. Environmental Protection Agency announced a modest tightening of federal air pollution standards by setting more stringent ozone limits for the first time in a decade. [News Source]

U.S. Tightens Air Pollution Standards After A Decade (Nasdaq) (RTTNews) - The U.S. Environmental Protection Agency announced a modest tightening of federal air pollution standards by setting more stringent ozone limits for the first time in a decade. [News Source]

U.S. Tightens Air Pollution Standards After A Decade (Nasdaq) (RTTNews) - The U.S. Environmental Protection Agency announced a modest tightening of federal air pollution standards by setting more stringent ozone limits for the first time in a decade. [News Source]