Book Description
A grandmother and her granddaughter exchange cards and letters over the years in this scrapbook record of their lives.
Author : United States. Congress. House. Committee on Interstate and Foreign Commerce. Subcommittee on Energy and Power
Publisher :
Page : 86 pages
File Size : 33,38 MB
Release : 1979
Category : Airplanes
ISBN :
A grandmother and her granddaughter exchange cards and letters over the years in this scrapbook record of their lives.
Author :
Publisher :
Page : pages
File Size : 36,50 MB
Release : 1979
Category :
ISBN :
Author :
Publisher :
Page : pages
File Size : 39,50 MB
Release : 1979
Category :
ISBN :
Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
Page : 123 pages
File Size : 19,38 MB
Release : 2016-08-09
Category : Technology & Engineering
ISBN : 0309440998
The primary human activities that release carbon dioxide (CO2) into the atmosphere are the combustion of fossil fuels (coal, natural gas, and oil) to generate electricity, the provision of energy for transportation, and as a consequence of some industrial processes. Although aviation CO2 emissions only make up approximately 2.0 to 2.5 percent of total global annual CO2 emissions, research to reduce CO2 emissions is urgent because (1) such reductions may be legislated even as commercial air travel grows, (2) because it takes new technology a long time to propagate into and through the aviation fleet, and (3) because of the ongoing impact of global CO2 emissions. Commercial Aircraft Propulsion and Energy Systems Research develops a national research agenda for reducing CO2 emissions from commercial aviation. This report focuses on propulsion and energy technologies for reducing carbon emissions from large, commercial aircraftâ€" single-aisle and twin-aisle aircraft that carry 100 or more passengersâ€"because such aircraft account for more than 90 percent of global emissions from commercial aircraft. Moreover, while smaller aircraft also emit CO2, they make only a minor contribution to global emissions, and many technologies that reduce CO2 emissions for large aircraft also apply to smaller aircraft. As commercial aviation continues to grow in terms of revenue-passenger miles and cargo ton miles, CO2 emissions are expected to increase. To reduce the contribution of aviation to climate change, it is essential to improve the effectiveness of ongoing efforts to reduce emissions and initiate research into new approaches.
Author :
Publisher :
Page : 1128 pages
File Size : 49,27 MB
Release : 1980-03
Category : Government publications
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Author : United States. Congress. Senate. Library
Publisher :
Page : 1172 pages
File Size : 23,53 MB
Release : 1979
Category : Government publications
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Author :
Publisher :
Page : 678 pages
File Size : 38,48 MB
Release : 1980
Category : Power resources
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Author :
Publisher :
Page : 1228 pages
File Size : 15,57 MB
Release : 1980
Category : Government publications
ISBN :
Author : United States. Superintendent of Documents
Publisher :
Page : 1220 pages
File Size : 27,27 MB
Release : 1968
Category : Government publications
ISBN :
Author : United States. Congress. House. Committee on Interstate and Foreign Commerce. Subcommittee on Energy and Power
Publisher :
Page : 144 pages
File Size : 25,9 MB
Release : 1977
Category : Energy conservation
ISBN :