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It is therefore critical that we work together to develop , demonstrate and implement cleaner and lower emissions technologies that allow for the continued economic use of fossil fuels while addressing air pollution and greenhouse gas emissions . " BACT " means an emission limitation , including , but not limited to , a visible emission standard , based on the maximum degree of reduction of each air contaminant subject to regulation under the Act which would be emitted from any proposed major source or major modification which , on a case-by-case basis , taking into account energy , environmental , and economic impacts and other costs , is achievable for such source or modification through application of production processes or available methods , systems , and techniques , including fuel cleaning or treatment or innovative fuel combustion techniques for control of such air contaminant . The activity remained intermittent with an episode of vigorous steam and ash emission beginning about 5:00 pm ADT on July 20 that produced a plume as high as 8 km by 1725 . This work provided most of the data supporting the conclusions found in EPA 's Congressionally mandated reports regarding air toxic emissions from coal-fired utility boilers : the Mercury Study Report to Congress ( 1997 ) and the Study of Hazardous Air Pollutant Emissions from Electric Utility Steam Generating Units - - Final Report to Congress ( 1998 ) . This puts new demand on the emission inventories that are used as input to these models . The problems are formidable - - skyrocketing energy demand and global warming emissions , widespread toxic chemical contamination and heavily polluted cities . " It could be used for attacking any moving or moveable target of high importance , especially one that through electronic emissions , communications , or other telltale signs gave only brief indications of its location . A special session will address emission projections for black carbon and organic carbon . CO2 Capture Project an international effort that addresses the issue of reducing emissions in a manner that will contribute to an environmentally acceptable and competitively priced continuous energy supply for the world . S : radio emission is extended and resolved into a central point source and single lobe - the central point source position and total emission are given D : radio emission is extended and resolved into two lobes - the centroid position and total emission are given T : radio emission is extended and resolved into three components - the central source position and total emission are given A : radio emission is likely to be indirectly linked to X-ray emission - an " association " The Right Ascension of the X-ray source minus the RA of the optical counterpart , in arcsec , for the J2000.0 equinox .