Air pollution control (21 - 30 of 80 items)
Climate Change: Information on Three Air Pollutants' Climate Effects and Emissions Trends
GAO-03-25: Published: Apr 28, 2003. Publicly Released: May 28, 2003.
Solar radiation is absorbed by the earth and is subsequently reemitted. The buildup of carbon dioxide and certain other gases in the earth's atmosphere traps some of that radiation. This is known as the greenhouse effect and is believed to contribute to a warming of the earth's climate. Concerns are growing that, in addition to carbon dioxide and other conventional greenhouse gases, certain air po...
Environmental Protection: Federal Planning Requirements for Transportation and Air Quality Protection Could Potentially Be More Efficient and Better Linked
GAO-03-581: Published: Apr 28, 2003. Publicly Released: May 8, 2003.
To protect the public from harmful emissions, transportation planners in areas with poor air must show that their plans will not make it worse. Every time they update their transportation improvement program (TIP) and their 20-year plan--every 2 and 3 years respectively--federal laws and regulations require that they ensure the emissions from their plans will not exceed the mobile source emissions...
Air Pollution: Meeting Future Electricity Demand Will Increase Emission of Some Harmful Substances
GAO-03-49: Published: Oct 30, 2002. Publicly Released: Nov 12, 2002.
Electric power plants burn fuels that can produce harmful emissions, such as carbon dioxide, mercury, nitrogen oxides, and sulfur dioxide, which can pose human health and environmental risks. To assess the potential risks of meeting future electricity demand, congressional committees asked GAO to (1) report on the Energy Information Administration's (EIA's) national and regional projections of suc...
Air Pollution: EPA Should Improve Oversight of Emissions Reporting by Large Facilities
GAO-01-46: Published: Apr 6, 2001. Publicly Released: May 7, 2001.
The Environmental Protection Agency (EPA) performs limited oversight of states' processes for verifying the accuracy of large industrial facilities' emissions reports. EPA's data show that most emissions determinations from large sources are based on generic emissions factors. Although EPA allows facilities to estimate their emissions in this manner, EPA officials generally consider direct methods...
Air Pollution: Emission Sources Regulated by Multiple Clean Air Act Provisions
RCED-00-155: Published: May 31, 2000. Publicly Released: Jul 3, 2000.
Pursuant to a congressional request, GAO reviewed the regulatory programs that target specific pollutants or sources of pollution under the 1990 Clean Air Act Amendments, focusing on: (1) examples of emission sources subject to regulation under more than one program authorized by the act; and (2) the status of the Environmental Protection Agency's (EPA) efforts to facilitate compliance for such so...
Climate Change: Observations on EPA's March 2000 Climate Change Report
RCED-00-166R: Published: Jun 5, 2000. Publicly Released: Jun 5, 2000.
Pursuant to a legislative requirement, GAO provided information on the Environmental Protection Agency's (EPA) March 2000 climate change report, focusing on: (1) the agency's climate change programs for fiscal year (FY) 2001; (2) the programs' goals, strategies, and procedures to verify and validate performance information; (3) EPA's justification for requested funding increases; and (4) how the p...
Air Pollution: Implementation of the Clean Air Act Amendments of 1990
T-RCED-00-183: Published: May 17, 2000. Publicly Released: May 17, 2000.
GAO discussed the Environmental Protection Agency's (EPA) implementation of the Clean Air Act Amendments and on sources regulated by multiple provisions of the act, focusing on: (1) the status of EPA's implementation of requirements established by the 1990 amendments; (2) the views from the stakeholders--state governments, local programs, industries that are regulated under the act, and environmen...
Air Pollution: Status of Implementation and Issues of the Clean Air Act Amendments of 1990
RCED-00-72: Published: Apr 17, 2000. Publicly Released: May 17, 2000.
Pursuant to a congressional request, GAO provided information on the 1990 Clean Air Act amendments, focusing on: (1) the status of the Environmental Protection Agency's (EPA) implementation of the requirements established by the 1990 amendments; and (2) views from state governments, local programs, industries that are regulated under the act, and environmental advocacy groups (collectively referre...
Acid Rain: Emissions Trends and Effects in the Eastern United States
RCED-00-47: Published: Mar 9, 2000. Publicly Released: Mar 27, 2000.
Pursuant to a congressional request, GAO provided information on acid rain emissions trends in the eastern United States, focusing on: (1) sulfur dioxide and nitrogen oxides emitted into the air at the national level; (2) deposition in the eastern United States and in three environmentally sensitive areas; (3) sulfates and nitrates in lakes in the Adirondack Mountains and the prospects for the lak...
Aviation and the Environment: Aviation's Effects on the Global Atmosphere Are Potentially Significant and Expected to Grow
RCED-00-57: Published: Feb 18, 2000. Publicly Released: Feb 23, 2000.
Pursuant to a congressional request, GAO provided information on the potential environmental effects of aviation emissions, focusing on what: (1) is currently known about aviation's contribution to global warming and how aviation emissions, both domestic and global, compare with emissions from other sources; and (2) options are available for reducing aviation emissions.GAO noted that: (1) aviation...