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The test method described in this Test Guideline assesses the effect of chemicals on the reproductive output of Daphnia magna Straus. To this end, young female Daphnia are exposed to the test substance added to water at a range of concentrations (at least five). For semi-static tests, at least 10 animals at each test concentration and for flow-through tests, 40 animals divided into four groups of 10 animals at each test
This method provides information on health hazard likely to arise from exposure to test substance via oral administration. The method is based on the repeated oral administration of the substance of interest during one limited period (one dose level daily during 28 days). This Guideline is intended primarily for use with rodents (rat preferably). At least 10 animals (5 female and 5 male) should be used for each dose level. Three
The method permits estimation of an LD50 with a confidence interval and the results allow a substance to be classified for acute toxicity according to the Globally Harmonised System of classification and labelling of chemicals.
It is easiest to apply to materials that produce death within couple of days. This Test Guideline is intended for use with rodents (rat female preferably). There are a limit test and a main test. The
Countries today face numerous environmental challenges, such as climate change, air and water pollution, natural resource management, natural disasters and industrial accidents.
Given that the majority of the world’s population lives in cities accounting for 60 to 80 percent of emissions, cities are key actors in our efforts to achieve long-term sustainable solutions to the global climate change challenge, according to Mr. Gurría.
- Conference on Competitive Cities and Climate Change
This working paper illustrates a methodology to assess economic impacts of climate change at city scale, focusing on sea level rise and storm surge.
OECD's comprehensive review of Hungary's environmental programs and policies, covering air and water management, nature and biodiversity, sustainable development, the environment-economy interface, the environment-social interface, and international commitments. The review includes relevant statistical information as well as a series of recommendations for strengthening environmental infrastructure, implementing environmental
In the lead-up to joining the European Union, Hungary made significant progress in reducing air and water pollution and protecting its nature and biodiversity says OECD’s latest Review of the Environmental Performance of Hungary.
Climate change is confronting us with the fierce urgency of “now”. It concerns the environment as well as the global economy. Global temperatures will continue to rise unless greenhouse gas emissions are reduced significantly. Impacts will include more intense heat waves, droughts, storms and floods, which in turn will cause damage to key infrastructure and crops, and increase risks to human health and life. Action is urgent and
This book is part of the OECD Environmental Performance Reviews Programme, which conducts peer reviews of environmental conditions and progress in each member country. It scrutinises countries' efforts to meet both domestic objectives and international commitments.