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排序方式: 共有127条查询结果,搜索用时 31 毫秒
101.
Javier Santillan Mark S. Heaston David S. Woodward Manish M. Joshi 《补救:环境净化治理成本、技术与工艺杂志》2010,20(2):107-113
The Air Force Center for Engineering and the Environment (AFCEE) is performing Environmental Restoration Program Optimization (E‐RPO) at various United States Air Force (USAF) installations to evaluate existing remediation strategies and recommend actions to advance issues impacting the remediation program. As sustainability practices (including green and sustainable remediation [GSR]) increase at Air Force facilities and throughout the environmental industry, the use of alternative energy‐collection sources (i.e., solar photovoltaics [PV] and wind turbines) is likely to increase dramatically. Although PV and wind power systems exhibit a low environmental footprint during their use, there are potential human health and environmental impacts from the manufacturing and recycling processes. This article presents a summary of available information regarding the environmental impacts associated with life‐cycle assessments that include raw material extraction and refinement, product manufacturing, use, and postuse disposal for PV and wind turbines (i.e., cradle‐to‐grave impacts). © 2010 Wiley Periodicals, Inc. 相似文献
102.
In the present study, noise levels were measured in two different areas within Haridwar City viz., residential and commercial
area, on festive day and non-festive day (after) of Deepawali in November 2007. The results show that there is an enhanced
pressure of noise during the festival of light. The average noise level on festive day shows a rise of 29.6 and 18.1% when
compared to non-festive day, respectively, for residential and commercial area. 相似文献
103.
104.
Climate variability, vulnerability, and coping mechanism in Alaknanda catchment, Central Himalaya, India 总被引:1,自引:0,他引:1
A study was carried out to discover trends in the rainfall and temperature pattern of the Alaknanda catchment in the Central Himalaya. Data on the annual rainfall, monsoon rainfall for the last decade, and average annual temperatures over the last few decades were analyzed. Nonparametric methods (Mann-Kendall and Sen's method) were employed to identify trends. The Mann-Kendall test shows a decline in rainfall and rise in temperature, and these trends were found to be statistically significant at the 95% confidence level for both transects. Sen's method also confirms this trend. This aspect has to be considered seriously for the simple reason that if the same trend continues in the future, more chances of drought are expected. The impact of climate change has been well perceived by the people of the catchment, and a coping mechanism has been developed at the local level. 相似文献
105.
Omkar Joshi Neelam C. Poudyal Lincoln R. Larson 《Environment, Development and Sustainability》2017,19(3):825-838
This study employed a cross-country panel data model to investigate the relative contributions of sociopolitical, natural and cultural characteristics and national tourism policies to international tourism growth. International tourism receipt data were adjusted for country-specific inflation and then analyzed in relation to standardized measures of the World Economic Forum’s “pillars of tourism competitiveness.” Results indicated that international tourism receipts are more responsive to policies and regulations favoring tourism, abundance of natural resources, richness in cultural heritage, and health and hygiene than they are to infrastructure, safety, price competitiveness, and other variables. Findings highlight key factors associated with international tourism receipts and provide a general framework that could inform policies and management strategies designed to promote sustainable international tourism development. 相似文献
106.
Heather L. MacLean Lester B. Lave Rebecca Lankey Satish Joshi 《Journal of the Air & Waste Management Association (1995)》2013,63(10):1769-1779
ABSTRACT We examine the life cycles of gasoline, diesel, compressed natural gas (CNG), and ethanol (C2H5OH)-fueled internal combustion engine (ICE) automobiles. Port and direct injection and spark and compression ignition engines are examined. We investigate diesel fuel from both petroleum and biosources as well as C2H5OH from corn, herbaceous bio-mass, and woody biomass. The baseline vehicle is a gasoline-fueled 1998 Ford Taurus. We optimize the other fuel/powertrain combinations for each specific fuel as a part of making the vehicles comparable to the baseline in terms of range, emissions level, and vehicle lifetime. Life-cycle calculations are done using the economic input-output life-cycle analysis (EIO-LCA) software; fuel cycles and vehicle end-of-life stages are based on published model results. We find that recent advances in gasoline vehicles, the low petroleum price, and the extensive gasoline infrastructure make it difficult for any alternative fuel to become commercially viable. The most attractive alternative fuel is compressed natural gas because it is less expensive than gasoline, has lower regulated pollutant and toxics emissions, produces less greenhouse gas (GHG) emissions, and is available in North America in large quantities. However, the bulk and weight of gas storage cylinders required for the vehicle to attain a range comparable to that of gasoline vehicles necessitates a redesign of the engine and chassis. Additional natural gas transportation and distribution infrastructure is required for large-scale use of natural gas for transportation. Diesel engines are extremely attractive in terms of energy efficiency, but expert judgment is divided on whether these engines will be able to meet strict emissions standards, even with reformulated fuel. The attractiveness of direct injection engines depends on their being able to meet strict emissions standards without losing their greater efficiency. Biofuels offer lower GHG emissions, are sustainable, and reduce the demand for imported fuels. Fuels from food sources, such as biodiesel from soybeans and C2H5OH from corn, can be attractive only if the co-products are in high demand and if the fuel production does not diminish the food supply. C2H5OH from herbaceous or woody biomass could replace the gasoline burned in the light-duty fleet while supplying electricity as a co-product. While it costs more than gasoline, bioethanol would be attractive if the price of gasoline doubled, if significant reductions in GHG emissions were required, or if fuel economy regulations for gasoline vehicles were tightened. 相似文献
107.
Our study explores the nexus between forests and local communities through participatory assessments and household surveys in the central Himalayan region. Forest dependency was compared among villages surrounded by oak-dominated forests (n = 8) and pine-dominated forests (n = 9). Both quantitative and qualitative analyses indicate variations in the degree of dependency based on proximity to nearest forest type. Households near oak-dominated forests were more dependent on forests (83.8%) compared to households near pine-dominated forests (69.1%). Forest dependency is mainly subsistence-oriented for meeting basic household requirements. Livestock population, cultivated land per household, and non-usage of alternative fuels are the major explanatory drivers of forest dependency. Our findings can help decision and policy makers to establish nested governance mechanisms encouraging prioritized site-specific conservation options among forest-adjacent households. Additionally, income diversification with respect to alternate livelihood sources, institutional reforms, and infrastructure facilities can reduce forest dependency, thereby, allowing sustainable forest management. 相似文献
108.
109.
Kumar Ankur Singh Prakhar Agarwal Tarun Joshi Manish Semwal Poonam Singh Kuldeep Pathak Parmanad Prakash Ramola Rakesh Chand 《Environmental science and pollution research international》2020,27(32):40229-40243
Environmental Science and Pollution Research - Regional averages of radon, thoron, and associated decay product concentration are reported to be higher than their respective global averages in... 相似文献
110.
Gururani Prateek Bhatnagar Pooja Bisht Bhawna Kumar Vinod Joshi Naveen Chandra Tomar Mahipal Singh Pathak Beena 《Environmental science and pollution research international》2021,28(46):65062-65082
Environmental Science and Pollution Research - Cold plasma has been a potent energy-efficient and eco-friendly advanced oxidation technology which has gained attention in recent decades as a... 相似文献