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Clean Cities Fact Sheet, May 2011

Description: Fact sheet describing Clean Cities, a DOE program that deploys alternative and advanced fuels and vehicles to displace petroleum in the transportation sector. It includes the contact information for its 87 coalitions.
Date: May 2011
Creator: United States. Department of Energy. Office of Energy Efficiency and Renewable Energy.
Partner: UNT Libraries Government Documents Department

Clean Cities Fact Sheet, December 2010

Description: Fact sheet describing Clean Cities, a DOE program that deploys alternative and advanced fuels and vehicles to displace petroleum in the transportation sector. It includes the contact information for its 87 active coalitions.
Date: December 2010
Creator: United States. Department of Energy. Office of Energy Efficiency and Renewable Energy.
Partner: UNT Libraries Government Documents Department

Clean Cities Fact Sheet, March 2011

Description: Fact sheet describing Clean Cities, a DOE program that deploys alternative and advanced fuels and vehicles to displace petroleum in the transportation sector. It includes the contact information for its 87 coalitions.
Date: March 2011
Creator: United States. Department of Energy. Office of Energy Efficiency and Renewable Energy.
Partner: UNT Libraries Government Documents Department

Wildfire Smoke: A Guide for Public Health Officials

Description: This report is designed to help local public health officials prepare for smoke events, to take measures to protect the public when smoke is present, and communicate with the public about wildfire smoke and health.
Date: May 2016
Creator: United States. Environmental Protection Agency.
Partner: UNT Libraries Government Documents Department

Estimation of Air Emissions During Production Phase from Active Oil and Gas Wells in the Barnett Shale Basin: 2010-2013

Description: The Barnett shale basin, the largest onshore gas field in the state of Texas, mainly produces natural gas. The basin’s oil and gas productions have dramatically increased over the past two decades with the enhancement via shale fracturing (fracking) technology. However, recent studies suggest that air emissions from shale fracking have significantly contributed to the growing air pollution problem in North Texas. In this study, air emissions from the Barnett shale basin during the production phase of the oil and gas activities (once the product is collected from the wells) are quantified. Oil and gas production data were acquired from the Texas Railroad Commission for the baseline years of 2010 through 2013. Methodology from prior studies on shale basins approved by the Texas Commission on Environmental Quality was employed in this study and the emission inventories from the production phase sources were quantified. Accordingly, the counties with the most gas operations in the basin, Tarrant, Johnson, Denton and Wise, were found to be the highest emitters of air pollutants. Tarrant County was responsible for the highest emitted NOx (42,566 tons) and CO (17,698 tons) in the basin, while Montague County released the maximum VOC emissions (87,601 tons) during the study period. Amongst the concerned emitted pollutants, VOC was the largest emitted pollutant during the study period (417,804 tons), followed by NOx (126,691 tons) and CO (47,884 tons). Significant Sources of air emissions include: storage tanks, wellhead compressor engines, and pneumatic devices. Storage tanks and pneumatic devices contributed to about 62% and 28% of the total VOC emissions, respectively. Whereas, wellhead compressor engines are primarily responsible for about 97% of the total NOx emissions. Finally, in Tarrant, Wise and Denton counties, the emissions increased during the study period due to increase in the oil and gas production, while Johnson County’s emission ...
Date: May 2015
Creator: Dohde, Farhan A.
Partner: UNT Libraries

Evaluation of the Influence of Non-Conventional Sources of Emissions on Ambient Air Pollutant Concentrations in North Texas

Description: Emissions of air pollutants from non-conventional sources have been on the rise in the North Texas area over the past decade. These include primary pollutants such as volatile organic compound (VOC) and oxides of nitrogen (NOx) which also act as precursors in the formation of ozone. Most of these have been attributed to a significant increase in oil and gas production activities since 2000 within the Barnett Shale region adjacent to the Dallas-Fort Worth metroplex region. In this study, air quality concentrations measured at the Denton Airport and Dallas Hinton monitoring sites operated by the Texas Commission on Environmental Quality (TCEQ) were evaluated. VOC concentration data from canister-based sampling along with continuous measurement of oxides of nitrogen (NOx), ozone (O3), particulate matter (PM2.5), and meteorological conditions at these two sites spanning from 2000 through 2014 were employed in this study. The Dallas site is located within the urban core of one of the fastest growing cities in the United States, while the Denton site is an exurban site with rural characteristics to it. The Denton Airport site was influenced by natural gas pads surrounding it while there are very few natural gas production facilities within close proximity to the Dallas Hinton site. As of 2013, there were 1362 gas pads within a 10 mile radius to the Denton Airport site but there were only 2 within a 10 mile radius to Dallas Hinton site. The Dallas site displayed higher concentrations of NOx and much lower concentrations of VOC than the Denton site. Extremely high levels of VOC measured at the Denton site corresponded with the increase in oil and gas production activities in close proximity to the monitoring site. Ethane and propane are two major contributors to the measured VOC concentration, suggesting the influence of fugitive emissions of natural gas. ...
Date: August 2015
Creator: Lim, Guo Quan
Partner: UNT Libraries

Climate Change in the United States: Benefits of Global Action

Description: This report summarizes and communicates the results of EPA's ongoing Climate Change Impacts and Risk Analysis (CORA) project. The goal of this work is to estimate to what degree climate change impacts and damages to multiple U.S. sectors (e.g., human, health, infrastructure, and water resources) may be avoided or reduced in a future with significant global action to reduce greenhouse gas (GHG) emissions, compared to a future in which current emissions continue to grow.
Date: 2015
Creator: United States. Environmental Protection Agency.
Partner: UNT Libraries Government Documents Department

Air Quality: TVA Plans to Reduce Air Emissions Further, but Could Do More to Reduce Power Demand

Description: A letter report issued by the General Accounting Office with an abstract that begins "The Tennessee Valley Authority (TVA) relied on its 11 coal-burning plants to supply 60 percent of its electric power in fiscal year 2001. These plants account for almost all of TVA's emissions of two key air pollutants--sulfur dioxide (SO2), which has been linked to reduced visibility, and nitrogen oxides (NOx), which contribute to the formation of harmful ozone. To meet an increase in demand of 1.7 percent annually through 2010, TVA estimates that it will need to expand its current generating capacity of 30,365 megawatts by 500 megawatts annually. Building new generating capacity can produce more emissions, which raises environment concerns. To lessen the need for new capacity, TVA and other electricity suppliers promote the efficient use of electricity through "demand-side management" programs, which seek to reduce the amount of energy consumed or to change the time of day when it is consumed. Even though TVA intends to increase its capacity to generate electricity through 2005, it also expects to reduce its SO2 and NOx emissions during the same time period, primarily by burning lower-sulfur coal, installing devices to control emissions at its existing plants, and relying on fuels other than coal for new capacity. Although TVA's demand-side management programs have allowed customers to cut their electrical consumption, these programs have made only modest contributions to reducing peak-time demand. TVA has limited the scope of its key program to reduce peak-time consumption by residential customers because TVA believes the program is not cost-effective. TVA projects that its demand-side programs will produce nearly twice as much in savings between 2001 and 2005 as was achieved in the previous five years. Other large utilities have more fully implemented the types of programs that TVA now has in place ...
Date: March 8, 2002
Creator: United States. General Accounting Office.
Partner: UNT Libraries Government Documents Department

Air Quality: Information on Tall Smokestacks and Their Contribution to Interstate Transport of Air Pollution

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Tall smokestacks--stacks of 500 feet or higher, which are primarily used at coal power plants--release air pollutants such as sulfur dioxide (SO2) and nitrogen oxides (NOx) high into the atmosphere to help limit the impact of these emissions on local air quality. Tall stacks can also increase the distance these pollutants travel in the atmosphere and harm air quality and the environment in downwind communities. The 1977 amendments to the Clean Air Act encourage the use of pollution control equipment over dispersion techniques, such as tall stacks, to meet national air standards. Section 123 of the Act does not limit stack height, but prohibits sources of emissions from using the dispersion effects of stack heights in excess of a stack's good engineering practice (GEP) height to meet emissions limitations. GAO was asked to report on (1) the number and location of tall stacks of 500 feet or higher at coal power plants and when they began operating; (2) what is known about such stacks' contribution to the interstate transport of air pollution and the pollution controls installed at plants with these stacks; and (3) the number of stacks that were built above GEP height since 1988 and the reasons for this. GAO analyzed Energy Information Administration (EIA) data on power plants, surveyed states with tall stacks, and interviewed experts on the transport of air pollution. GAO is not making recommendations in this report. The Environmental Protection Agency and the Department of Energy stated they had no comments on this report"
Date: May 11, 2011
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department

Air Pollution Control Act

Description: This law was passed by the Republic of China (Taiwan) to control air pollution and protect the environment and human health.
Date: May 30, 2006
Creator: China (Republic : 1949- ). Huan jing bao hu shu
Partner: UNT Libraries

Atmospheric Ammonia: Sources and Fate. A Review of Ongoing Federal Research and Future Needs

Description: This report provides a brief summary of the state of the current state of federal scientific research related to atmospheric ammonia, based on discussions from an October, 1999 meeting of the Air Quality Research Subcommittee of CENR.
Date: June 2000
Creator: National Science and Technology Council (U.S.). Air Quality Research Subcommittee.
Partner: UNT Libraries

California Assembly Bill No. 1493

Description: The "Pavley" bill requires the registry, in consultation with the State Air Resources Board, to adopt procedures and protocols for the reporting and certification of reductions in greenhouse gas emissions from mobile sources for use by the state board in granting the emission reduction credits. This bill requires the state board to develop and adopt, by January 1, 2005, regulations that achieve the maximum feasible reduction of greenhouse gases emitted by passenger vehicles and light-duty trucks.
Date: July 2002
Creator: Governor Gray Davis & Governor Gray Davis
Partner: UNT Libraries

Environmental Effects of Ozone Depletion: 1994 Assessment

Description: A change in the composition of the stratosphere becomes relevant to society only if it has noticeable effects. This places the assessment of effects in a pivotal role in the problem of ozone depletion. Decreases in the quantity of total-column ozone, as now observed in many places, tend to cause increased penetration of solar UV-B radiation (290-315 nm) to the Earth's surface. UV-B radiation is the most energetic component of sunlight reaching the surface. It has profound effects on human health, animals, plants, microorganisms, materials and on air quality. Thus any perturbation which leads to an increase in UV-B radiation demands careful consideration of the possible consequences. This is the topic of the present assessment made by the Panel on Environmental Effects of Ozone Depletion.
Date: November 1994
Creator: United Nations Environment Programme
Partner: UNT Libraries

Uses and Limitations of Observations, Data, Forecasts, and Other Projections in Decision Support for Selected Sectors and Regions

Description: This Synthesis and Assessment Product (SAP), Uses and Limitations of Observations, Data, Forecasts, and Other Projections in Decision Support for Selected Sectors and Regions. This is part of a series of 21 SAPs produced by the CCSP aimed at providing current assessments of climate change science to inform public debate, policy, and operational decisions. This SAP focuses on the use of climate observations, data, forecasts, and other projections in decision support.
Date: August 2008
Creator: U.S. Climate Change Science Program and the Subcommittee on Global Change Research
Partner: UNT Libraries

Africa: Atlas of Our Changing Environment

Description: This comprehensive atlas provides data, satellite imagery, and analysis of the environmental conditions and issues relevant to each African country, and several surrounding island nations. The atlas also covers trans-border international issues in Africa.
Date: 2008
Creator: United Nations Environment Programme
Partner: UNT Libraries

The Clean Air Act

Description: The United States Clean Air Act is legislation authorizing the Environmental Protection Agency to control air pollutiants on a national level.
Date: February 24, 2004
Creator: United States. Congress. Senate.
Partner: UNT Libraries