全文获取类型
收费全文 | 990篇 |
免费 | 11篇 |
国内免费 | 8篇 |
专业分类
安全科学 | 23篇 |
废物处理 | 11篇 |
环保管理 | 299篇 |
综合类 | 435篇 |
基础理论 | 63篇 |
污染及防治 | 55篇 |
评价与监测 | 13篇 |
社会与环境 | 99篇 |
灾害及防治 | 11篇 |
出版年
2023年 | 5篇 |
2022年 | 8篇 |
2021年 | 15篇 |
2020年 | 11篇 |
2019年 | 13篇 |
2018年 | 16篇 |
2017年 | 24篇 |
2016年 | 19篇 |
2015年 | 14篇 |
2014年 | 33篇 |
2013年 | 57篇 |
2012年 | 19篇 |
2011年 | 50篇 |
2010年 | 22篇 |
2009年 | 51篇 |
2008年 | 78篇 |
2007年 | 56篇 |
2006年 | 54篇 |
2005年 | 35篇 |
2004年 | 38篇 |
2003年 | 52篇 |
2002年 | 44篇 |
2001年 | 41篇 |
2000年 | 60篇 |
1999年 | 50篇 |
1998年 | 51篇 |
1997年 | 29篇 |
1996年 | 13篇 |
1995年 | 9篇 |
1994年 | 7篇 |
1993年 | 11篇 |
1992年 | 7篇 |
1991年 | 5篇 |
1990年 | 1篇 |
1989年 | 4篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 2篇 |
排序方式: 共有1009条查询结果,搜索用时 15 毫秒
981.
《International Journal of Green Energy》2013,10(1):65-77
Abstract Heating and air-conditioning systems have very low exergetic efficiency as they dissipate primary energy resources at low temperatures usually between 90 and 60°C. This compounds the problem that buildings spend approximately 30% of all the energy consumed in the U.S. for heating and air-conditioning. The overall result is a large entropy production and long-term environmental degradation that can be resolved only by substituting primary energy resources by low-temperature, waste, or alternative energy resources, usually available below 50°C. For such a replacement to be feasible the environmental cost of exergy production must be factored into calculations and compatible HVAC systems must be developed without any need for temperature peaking or equipment oversizing. This article addresses environmental and often-conflicting problems associated with exergy production by HVAC systems and presents an analytical optimization and control algorithm. Results indicate that when a careful design optimization is accompanied by a dynamic control of the split between radiant and convective means of satisfying thermal HVAC loads, exergy efficient sustainable buildings may be cost effective and environmentally benign. 相似文献
982.
《International Journal of Green Energy》2013,10(3):327-335
Abstract A concept of occupational entropy is developed and related to the efficient use of mental (cognitive, emotional, and moral) resources and capacities. The corresponding “mind” indicators and pertinent response actions have proven essential for monitoring the state and projecting the behavior changes toward energy sustainability, as well as sustainable development in general. 相似文献
983.
984.
Abstract Based on data of trade, foreign direct investment (FDI), economic development and environmental conditions in China's 30 provinces between 1990–2002, this paper deals with the impact on Environmental Kuznets Curve (EKC) of trade and FDI in China. The results show no direct impact on EKC of trade, on the one hand. However, trade contributes significantly to economic growth, and has played a positive role in introducing advanced pollution prevention technology and environmental management methodology to China. Therefore, a proactive trade policy will help solve the environmental pollution problem brought by economic growth. On the other hand, there is a positive correlation between FDI and pollutant emission, which proves that FDI does have some negative influence on environment in China due to hasty introduction of foreign capital and inadequate environmental management system in China. 相似文献
985.
Shan Weidong 《中国人口.资源与环境(英文版)》2013,11(2):58-62
Abstract This paper analyses redounded profits of cooperation and non-cooperation among cities in urban agglomerations based on game theory. It discusses the problems of economical development among cities with feeble cooperation, and deduces the conclusion that only cooperation of cities produces the maximum profits and realizes Pareto efficiency for cities and urban agglomerations. The paper states that cooperation is the cornerstone of economic sustainable development in urban agglomerations in profits produced by cooperation among cities. Some suggestions to accelerate cooperation among cities are proposed. 相似文献
986.
Recent interest in sustainable forest management planning in the Yukon has coincided with growing public awareness of climate
change, providing an opportunity to explore how forestry plans are incorporating climate change. In this paper, the Strategic
Forest Management Plans for the Champagne and Aishihik First Nations Traditional Territory (CATT) and the Teslin Tlingit Traditional
Territory (TTTT) are examined for evidence of adaptation to climate change. For each plan, management policies and practices
that are also recognized as ways to adapt to climate change are identified to provide information on the incremental costs
and benefits of additional adaptation efforts. A typology for classifying sustainable forest management plans according to
how they address climate change is proposed and applied to the CATT and TTTT plans. This typology, which may be useful to
any future retrospective assessments on how successful these or other sustainable forest management plans have been in addressing
and managing the risks posed by climate change, consists of a matrix that categorizes plans into one of four types; (1) proactive-direct,
(2) proactive-indirect, (3) reactive-direct, and (4) reactive-indirect. Neither of the plans available for the southern Yukon
explicitly identifies climate change vulnerabilities and actions that will be taken to reduce those vulnerabilities and manage
risks. However, both plans have incorporated some examples of ‘best management practices’ for sustainable forest management
that are also consistent with appropriate climate adaptation responses. Even in a jurisdiction facing rapid ecological changes
driven by climate change, where there is a relatively high level of awareness of climate change and its implications, forestry
planning processes have yet to grapple directly with the risks that climate change may pose to the ability of forest managers
to achieve the stated goals and objectives of sustainable forest management plans.
相似文献
J. L. InnesEmail: |
987.
Kirsten Halsnæs Priyadarshi Shukla 《Mitigation and Adaptation Strategies for Global Change》2008,13(2):105-130
The paper presents a number of ideas on how climate change policy implementation in developing countries can be supported
by alternative international cooperation mechanisms that are based on stakeholder interests and policy priorities including
broader economic and social development issues. It includes a brief review of current development policies, technological
research and promotion efforts, and climate change that demonstrates that mutual policy initiatives undertaken by governments
and the private sector actually have major positive impacts on climate change without being initiated by this global policy
concern. Furthermore a number of examples are given on how future development objectives in Brazil, China, and India jointly
can support economic and social goals and global climate change concerns if these goals are taken into consideration and supported
by international cooperative mechanisms. The paper proposes international cooperative mechanisms that can support the implementation
of integrated development and climate change policies. The mechanisms include an international sustainable development (SD)
and Climate Finance Mechanism (SDCFM), technology development and transition programmes, technology standards, and other measures.
相似文献
Priyadarshi Shukla (Corresponding author)Email: |
988.
There is debate whether or not further growth of metal extraction from the earth's crust will be sustainable in connection with geologic scarcity. Will future generations possibly face a depletion of specific metals? We study whether, for which metals and to what extent the extraction rate would need to be reduced in order to be sustainable. To do so, we propose an operational definition for the sustainable extraction rate of metals. We have divided 42 metals in 4 groups according to their geologic scarcity. Applying the proposed sustainability definition to the 17 scarcest metals, shows that for almost all considered metals the global consumption of primary resources needs to be reduced to stay within sustainable limits as defined in our analysis. The 8 geologically scarcest metals are antimony, bismuth, boron, copper, gold, molybdenum, rhenium and zinc. 相似文献
989.
Material selection in manufacturing may be characterized as a series of trade-offs between characteristics, properties, environmental impacts, sustainability, availability, and economics. Societal concerns about the environmental impacts of construction practices and materials have been expressed through an increase in the demand, production and use of “green” building products. This, combined with a desire to integrate more bioproducts and natural and renewable resources into the construction industry, has extended to the production and promotion of insulation made from sheep's wool.Although substantial literature exists on the insulation properties and other benefits of wool, less is known about the economics and manufacturing processes of sheep's wool insulation at varying scales of production. This paper contributes to this field of enquiry through presentation of the preliminary results of a wool insulation manufacturing pilot project, in which the scale and economics of the production of sheep's wool insulation were considered. Processing techniques, the impact of sheep breed, yield, energy use, and manufacturing costs were also examined. The results of the pilot project indicate that, while sheep's wool insulation produced at a smaller, or artisanal scale shows some potential, scale of operation and volume of production need to be carefully considered in order to ensure long-term sustainability of the operation. Using the least expensive sheep's wool available for the manufacture of wool batt insulation (and thereby reducing production costs) did not, in this pilot study, have a negative impact on productivity or product performance. Diversion of this waste stream of currently less marketable, and consequently less valuable wool, into the production of a green building material may offer small but significant benefit to sheep producers and the broader agricultural community, as well as consumers. 相似文献
990.
The aim of this research is to verify the relationship between the maturity levels of environmental management and the adoption of green supply chain management (GSCM) practices by electro-electronic companies in Brazil. In this work a two-phase research was conducted, with one quantitative and the other qualitative. The quantitative phase aimed to test whether a relationship between the maturity levels of environmental management and GSCM exists, while the qualitative phase tried to detail the characteristics of this relationship. The quantitative phase was conducted through a survey with 100 Brazilian electro-electronic companies and the collected data were processed using Structural Equation Modeling. For the qualitative phase, a multiple case study was conducted with three companies located in Brazil. The results indicate that: (1) The main hypothesis was confirmed and considered statistically valid, indicating that, indeed, the maturity level of environmental management influences the adoption of GSCM practices; (2) a coevolution tends to occur between the environmental maturity and the GSCM practices; that is, the more developed is the company's environmental management, more complex GSCM practices are adopted; and (3) the GSCM internal practices tend to present a greater relative adoption than the external practices; these external practices of GSCM tend to be adopted when the company is inserted in a higher environmental stage and/or operates under a scenario of stronger normative environmental pressure. By the way, this is the first research mixing survey and case studies on GSCM in Brazil. 相似文献