全文获取类型
收费全文 | 78篇 |
免费 | 0篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 9篇 |
废物处理 | 2篇 |
环保管理 | 20篇 |
综合类 | 24篇 |
基础理论 | 11篇 |
污染及防治 | 7篇 |
评价与监测 | 1篇 |
社会与环境 | 5篇 |
出版年
2023年 | 2篇 |
2021年 | 1篇 |
2020年 | 3篇 |
2019年 | 1篇 |
2016年 | 3篇 |
2015年 | 2篇 |
2014年 | 4篇 |
2013年 | 3篇 |
2012年 | 1篇 |
2011年 | 5篇 |
2010年 | 1篇 |
2009年 | 7篇 |
2008年 | 6篇 |
2007年 | 3篇 |
2006年 | 4篇 |
2005年 | 5篇 |
2004年 | 1篇 |
2003年 | 4篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 5篇 |
1998年 | 4篇 |
1997年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有79条查询结果,搜索用时 18 毫秒
41.
Introduction: A regulatory training standard for construction workers using fall protection equipment became mandatory in 2015 in the province of Ontario, Canada. By the end of the transition period in 2017, 418,000 workers had been trained to the new standard. Two primary research questions were posed: (1) To what extent does the WAH training affect practices at the worksite? and (2) Has there been a change in the incidence of fall-from-height injuries coincident with the introduction of the WAH Training Standard? Materials and methods: A longitudinal survey of 633 learners was conducted in 2017 at one-, four- and seven-week post-training. A quasi-experiment estimated the incidence of lost-time injuries attributed to falls from heights in 2017 compared to 2012–2014 for a census of construction workers insured for work disability in Ontario, Canada. Results: Learners self-reported substantial increases in knowledge of and improvements in safe work practices when working at heights. The incidence rate of lost-time claim injuries attributed to falls targeted by the training declined by 19.6% (95% CI: 10.7, −27.6), compared to corresponding declines of 2.1% (95% CI: −6.3, 9.9) for other fall injuries and 7.2% (95% CI: 1.8, 12.3) for non-fall traumatic injuries. The observed decline was largest among the smallest employers (<5 full-time equivalent employees). Conclusion: The evaluation findings provide consistent support for a conclusion that the mandatory training standard was effective in reducing the incidence of injuries targeted by the training. However, the effects were modest and did not eliminate the problem. Practical application: A mandatory training standard should be considered as one approach to preventing traumatic injuries. However, other approaches higher in the hierarchy of risk controls should also be considered. 相似文献
42.
Pierre Fleckinger Matthieu Glachant 《Journal of Environmental Economics and Management》2011,62(1):41-52
Does self-regulation improve social welfare? We develop a policy game featuring a regulator and a firm that can unilaterally commit to better environmental or social behavior in order to preempt future public policy efforts. We show that the answer depends on the set of policy instruments available to the regulator. Self-regulation improves welfare if the regulator can only use mandatory regulation, but it reduces welfare when the regulator opts for a voluntary agreement. This suggests that self-regulation and voluntary agreements are not good complements from a welfare point of view. We derive policy implications, and extend the basic model in several dimensions. 相似文献
43.
Magda RouwErnst Worrell 《Resources, Conservation and Recycling》2011,55(4):483-492
Packaging materials are one of the largest contributors to municipal solid waste production. This paper evaluates the material impacts packaging policy in The Netherlands in the period 1986-2007. Five different voluntary agreements were implemented over this period to reduce the environmental impact of packaging. The analysis shows that among the investigated indicators, population statistically is the most robust indicator to estimate the packaging demand. A baseline is developed on the basis of population growth in The Netherlands, and is used as reference to evaluate policy impacts. The policy periods are evaluated on the basis of overall effectiveness compared to the baseline and target achievement. Dutch packaging policies have been effective to reduce the total packaging volume until 1999. After 2000, packaging consumption increased more rapidly than the baseline, suggesting that policy measures have not been effective. The largest increase in packaging recycling rates was achieved during the first policy period. More clear and consistent packaging policy measures and targets could improve the effectiveness of policies. 相似文献
44.
Centner TJ 《Environmental management》2006,37(6):745-752
As point sources of pollution in the United States, concentrated animal feeding operations (CAFOs) are subject to the National
Pollution Discharge Elimination System permitting system requirements. Changes to federal regulations in 2003 and a 2005 court
decision have increased the governmental oversight of CAFOs. Manure application to fields from “large CAFOs” that results
in unpermitted discharges can be regulated under the Clean Water Act. The U.S. Environmental Protection Agency’s interpretation
of agricultural stormwater discharges was approved so that unpermitted discharges may arise if an owner or operator of a CAFO
fails to apply manure correctly. Owners and operators do not, however, have a duty to secure governmental permits in the absence
of a discharge. Turning to the federal provisions regarding nutrient management plans, a court found that they were deficient.
Moreover, the federal government needs to reconsider requirements that would reduce pathogens from entering surface waters.
Although these developments should assist in reducing the impairment of U.S. waters, concern still exists. Greater oversight
of nutrient management plans and enhanced enforcement efforts offer opportunities to provide greater assurance that CAFO owners
and operators will not allow a discharge of pollutants to enter surface waters. 相似文献
45.
According to the United States Environmental Protection Agency (US EPA), a significant percentage of residential onsite sewage
systems (OSSs) are failing at any given time. The US EPA has therefore issued a set of recommended guidelines for OSS regulatory
programs aimed at reducing overall failure rates. We conducted a survey of OSS regulatory program administrators with jurisdictions
bordering a Great Lake. Our goal was to determine their programs’ capacities to meet the US EPA’s recommendations. We found
that although some local programs meet the US EPA’s recommendations, most do not. In this article, we present our findings
and conclusions for one of the US EPA’s models, the baseline “Homeowner Awareness” model. Most areas do not have recommended
requirements that systems be inspected when properties transfer between owners. A majority do not track changes in ownership
within the computerized databases they use to record information about systems. Although most provide at least “one-time”
information to homeowners regarding proper OSS maintenance, most do not contact them periodically with reminders of needed
maintenance. We include recommendations for resolving some of the issues that our research identified. 相似文献
46.
Torkild Tveraa Bernt-Erik Sæther Ronny Aanes Kjell Einar Erikstad 《Behavioral ecology and sociobiology》1998,43(2):73-79
In Procellariiformes, the parents guard the chick after it has attained homeothermy. This strategy may reduce the probability
that a small chick is taken by predators, but is costly as only one parent can forage at a time. The decision to leave the
chick may therefore be a compromise between the chick's vulnerability to predators, the body condition of the parent on the
nest and whether the foraging parent returns in time. We studied how the number of days that parents guarded the chick was
related to the body mass of the parent at the nest and the time the foraging parent spent at sea in the Antarctic petrel Thalassoica antarctica. We also examined how the body mass of the parent on the nest and the duration of the foraging trips influenced the chicks'
body condition at the end of the guarding period. When the foraging parent did not return to the nest in time to relieve its
mate, the number of days the parent on the nest kept guarding the chick was positively related to its body mass on arrival
in the colony. The number of days the foraging parent spent at sea was positively related to the body mass of its mate, but
those that returned in time had a shorter stay at sea relative to their mate's body mass than those that did not return before
their mate had left. Apparently, both the body mass of the parent at the nest and the ability of the foraging parent to adjust
its stay at sea to the mate's body mass is important for the number of days the parents guard the chick and also the chick's
body condition at this point. The inability to return to the nest before the mate has left may be the result of needing a
minimum amount of time at sea to find food, or because some parents having low foraging success and therefore prolong their
stay at sea.
Received: 10 October 1997 / Accepted after revision: 14 March 1998 相似文献
47.
侯伟丽 《中国人口.资源与环境》2008,18(6)
我国在国际贸易和国际分工中是否表现出"环境相对比较优势"?本文通过考察进出口产品结构变化和我国吸引的外国直接投资的行业结构变化趋势对这一问题进行了实证分析,结果发现我国进出口产品结构没有向污染密集型产品转变,外商投资的行业结构也没有偏向污染密集型产业.虽然我国目前经济增长的自然资源和环境成本较大,但这主耍是国内资源使用效率低下和国内消费升级、产业结构转变造成的.实际上,参与国际贸易和国际分工使我国的经济结构向更清洁的方向转变,有利于减轻我国经济增长中的环境压力.因此,本文认为虽然目前我国的环境规制水平较一些发达国家低,但这并不等同于我国经济具有或表现出了"环境相对比较优势",所谓的"环境相对比较优势"在实际上是不存在的. 相似文献
48.
运用委托代理理论基本原理,分析了节能管理中政府与企业的利益关系;侧重分析了作为委托者的政府与作为代理人的企业在节能问题上的理性水平差异,以及由此决定的双方在行为选择上的不同.研究表明:“委托-代理”模型是一个富有效率的机制,在委托代理机制下,政府和企业在节能上的利益具有一致性.在一定条件下,地方政府通过改变激励策略,不仅可以使企业的节能努力水平产生变化,还会使信息不对称的格局发生改变,实现节能调控的帕累托最优;企业获得财务意义上的好处,地方政府不仅因节能调控成效显著而得到中央的奖励,还会因其良好的政府形象而得到公众的支持. 相似文献
49.
W. Andrew Marcus 《Environmental management》1989,13(6):703-713
A number of state and federal agencies are presently attempting to develop management strategies for contaminated aquatic sediments. Until now, research and debate on sediment guidelines and regulations has focused almost exclusively on biological and chemical techniques for determining when sediments pose an environmental risk. Hydrologic factors must also be considered, however, if these biochemically based techniques for establishing sediment quality standards are to be feasible. Hydrologic issues that need to be addressed include how to define the boundaries of the aquatic environment, the scope of sediment regulations in ephemeral waters, regulations and sampling procedures in heterogeneous sediments, and timing of samples for monitoring and enforcement purposes 相似文献
50.