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Ação do enxofre em chuva ácida simulada sobre parâmetros morfofisiológicos de Phaseolus vulgaris L. (Fabaceae) - doi: 10.4025/actasciagron.v32i3.4273 Agronomy
Dias, Bruna Borba; Universidade Federal de Santa Catarina; Leite, Maysa de Lima; Universidade Estadual de Ponta Grossa, Paraná; Farago, Paulo Vitor; Universidade Estadual de Ponta Grossa, Paraná; Oliveira, André Vicente de; Universidade Estadual de Ponta Grossa, Paraná; Beruski, Gustavo Castilho; Universidade Estadual de Ponta Grossa, Paraná.
O presente trabalho teve o objetivo de analisar os efeitos do enxofre e da chuva ácida simulada sobre a estrutura foliar do feijoeiro (Phaseolus vulgaris L), nos aspectos morfoanatômicos, teores de clorofila a, b, total e feofitina. As plantas-controle sofreram simulações de chuva com pH 6,0 e as plantas-teste sofreram simulação de chuva ácida com pH 3,0. As concentrações de clorofila a, b e total diminuíram no estádio de floração (R6). Já, no estádio R7, onde surgem as primeiras vagens, os teores aumentaram, indicando possível resistência e/ou adaptação dos espécimes às simulações ácidas. O tratamento ácido afetou a concentração de clorofila que foi degradada por processos oxidativos sem a sua conversão em feofitina. Também se observou diminuição na...
Palavras-chave: 5.00.00.00-4; 5.01.03.06-7; Phaseolus vulgaris; Chuva ácida; Enxofre; Clorofila; Anexos epidérmicos Ciências Agrárias e Fisiologia de Plantas Cultivadas Phaseolus vulgaris; Acid rain; Sulfur; Chlorophyll; Epidermal annexes.
Ano: 2010 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4273
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Acidez da água de chuva no nordeste paraense. Infoteca-e
DINIZ, T. D. de A. S..
1980
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Chuva acida; Nordeste; Pará; Amazônia; Brasil; Acid rain.
Ano: 1980 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/377578
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Cost Savings, Market Performance, and Economic Benefits of the U.S. Acid Rain Program AgEcon
Burtraw, Dallas.
This paper reports on four areas of research concerning Title IV of the 1990 Clean Air Act Amendments that regulates emissions of SO2 from electricity generation. The first is the costs of the program over the long-run as estimated from the current perspective taking into account recent changes in fuel markets and technology. We compare projected costs with potential cost savings that can be attributable to formal trading of emission allowances. The second area is an evaluation of how well allowance trading has worked to date. The third area is the relationship between compliance costs and economic costs from a general equilibrium perspective. The fourth area is a comparison of benefits and costs for the program.
Tipo: Working or Discussion Paper Palavras-chave: Acid rain; Benefit-cost analysis; Air pollution; Permit trading; Clean Air Act; Environmental Economics and Policy; H43; Q2; Q4.
Ano: 1998 URL: http://purl.umn.edu/10885
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Dinâmica do pH da água das chuvas em Passo Fundo, RS. Repositório Alice
CUNHA, G.R. da; SANTI, A.; DALMAGO, G.A.; PIRES, J.L.F.; PASINATO, A..
O objetivo deste trabalho foi avaliar a dinâmica do pH da água das chuvas em Passo Fundo, RS, de 1992 a 2007. A água foi coletada em recipiente de PVC (diâmetro de 10 cm) acoplado a um pluviômetro, e as amostras foram armazenadas em congelador para posterior determinação do pH. A dinâmica do pH da água foi avaliada por meio das médias mensais e anuais do pH, da probabilidade empírica da distribuição dos valores anuais de pH por estação do ano e da frequência relativa acumulada do pH. A água das chuvas incidentes na região de Passo Fundo apresentou pH acima de 5,6, que é o limite para que a chuva seja considerada ácida. A análise do período de 16 anos indicou tendência de redução do pH da água das chuvas em 0,023 ao ano. Nesse período, a redução foi de 6,1...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Chuva ácida; Indicador ambiental; Qualidade de água; Sustentabilidade; Acid rain; Environmental index; Sustainability; Water quality.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/125876
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Dinâmica do pH da água das chuvas em Passo Fundo, RS. Repositório Alice
CUNHA, G. R. da; SANTI, A.; DALMAGO, G. A.; PIRES, J. L. F.; PASINATO, A..
2009
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Chuva ácida; Indicador ambiental; Qualidade de água; Sustentabilidade; Acid rain; Environmental index; Sustainability; Water quality.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/822452
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Effects of Simulated Acid Rain on Pollination of Rice Plants Taiwan Agricultural Research Institute
Ming-Hwi Yao;Shu Chen;Jin-Chuan Tsai;Lien-Sheng Liang; 姚銘輝;陳述;蔡金川;梁連勝.
[[abstract]]This study was conducted to determine the effect of simulated acid rain of pH 3.0, 4.0 and 5.6 on pollen grain germination and yield in rice (Oryza sativa L.) plants. Results indicated that direct exposure to acid rain of pH 3.0 and pH 4.0 acid rain reduced pollen grain germination by up to 30% and 10%, respectively. These alternations closely paralleled to decreasing in seed setting, number of spikelets per panicle and grain yield. When exposed to pH 5.6 acid rain, rate of pollen grain germination decreased, but the effect was not significant. Germination rate of pollen grown on agar medium at pH 4.0 was 54% of that grown on pH 5.6. At pH 3.0 the pollen graims almost did not germinate. The two rice varieties (Tainung 67 and Taichung sen 10)...
Palavras-chave: Acid rain; Rice; Oryza sativa L.; Pollen grain germination 酸雨; 水稻; 花粉發芽; 產量構成因素 Yield components [[classification]]8.
Ano: 1996
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Sulfur Dioxide Control by Electric Utilities: What Are the Gains from Trade? AgEcon
Carlson, Curtis; Burtraw, Dallas; Cropper, Maureen L.; Palmer, Karen L..
Title IV of the 1990 Clean Air Act Amendments (CAAA) established a market for transferable sulfur dioxide (SO2) emission allowances among electric utilities. This market offers firms facing high marginal abatement costs the opportunity to purchase the right to emit SO2 from firms with lower costs, and is expected to yield cost savings compared to a command and control approach to environmental regulation. This paper uses econometrically estimated marginal abatement cost functions for power plants affected by Title IV of the CAAA to evaluate the performance of the SO2 allowance market. Specifically, we investigate whether the much-heralded fall in the cost of abating SO2, compared to original estimates, can be attributed to allowance trading. We demonstrate...
Tipo: Working or Discussion Paper Palavras-chave: Acid rain; Sulfur dioxide; Air pollution; Clean Air Act; Title IV; Permit trading; Environmental Economics and Policy; H43; Q2; Q4.
Ano: 2000 URL: http://purl.umn.edu/10790
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The Costs and Benefits of Reducing Acid Rain AgEcon
Burtraw, Dallas; Krupnick, Alan J.; Mansur, Erin T.; Austin, David H.; Farrell, Deirdre.
Title IV of the 1990 Clean Air Act Amendments initiated a dramatic reduction in emissions of sulfur dioxide and nitrogen oxides by electric power plants. This paper presents the results of an integrated assessment of the benefits and costs of the program, using the Tracking and Analysis Framework (TAF) developed for the National Acid Precipitation Assessment Program (NAPAP). Although dramatic uncertainties characterize our estimates especially with respect to the benefits of the program, many of which we have modeled explicitly, we find that the benefits can be expected to substantially outweigh the costs of the emission reductions. The lion's share of benefits result from reduced risk of premature mortality, especially through reduced exposure to...
Tipo: Working or Discussion Paper Palavras-chave: Acid rain; Sulfur dioxide; Nitrogen oxides; Cost-benefit analysis; Clean Air Act; Title IV; Environmental Economics and Policy; H43; Q2; Q4.
Ano: 1997 URL: http://purl.umn.edu/10692
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The Effects of Trading and Banking in the SO2 Allowance Market AgEcon
Burtraw, Dallas; Mansur, Erin T..
The 1990 Clean Air Act Amendments initiated a dramatic reduction in emissions of sulfur dioxide and nitrogen oxides by electric power plants. This paper provides an evaluation of the environmental and public health consequences of the trading and banking provisions of Title IV. A sizable shift in the geographic location of emissions under Title IV (in some states of over 20 percent of emissions after Title IV is implemented) is attributable to trading and/or to banking. There has been considerable concern that this shift in emissions would cause harm to downwind areas due to long-range transport of pollution. We find the resulting change in atmospheric concentrations and deposition of pollutants, and the change in monetized health benefits, are most...
Tipo: Working or Discussion Paper Palavras-chave: Acid rain; Sulfur dioxide; Trading; Benefit-cost analysis; Clean Air Act; Environmental Economics and Policy; H43; Q2; Q4.
Ano: 1999 URL: http://purl.umn.edu/10630
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The Evolution of NOx Control Policy for Coal-Fired Power Plants in the United States AgEcon
Burtraw, Dallas; Evans, David A..
Emissions of nitrogen oxides (NOx ) contribute to formation of particulate matter and ozone, and also to acidification of the environment. The electricity sector is responsible for about 20% of NOx emissions in the United States, and the sector has been the target of both prescriptive (command-and-control) and flexible (cap-and-trade) approaches to regulation. We summarize the major NOx control policies affecting this sector, and provide some perspectives as to their effectiveness. While both prescriptive and flexible approaches continue to play an important role, significant new proposals have wholly embraced a cap-and-trade approach.
Tipo: Working or Discussion Paper Palavras-chave: Emissions trading; Cap and trade; Air pollution; Cost-benefit analysis; Electricity; Particulates; Ozone; Nitrogen oxides; Acid rain; Environmental Economics and Policy; Q25; Q4; D62; Q28.
Ano: 2003 URL: http://purl.umn.edu/10645
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The Paparazzi Take a Look at a Living Legend: The SO2 Cap-and-Trade Program for Power Plants in the United States AgEcon
Burtraw, Dallas; Palmer, Karen L..
For years economists have urged policymakers to use market-based approaches such as cap-and-trade programs or emission taxes to control pollution. The SO2 allowance market created by Title IV of the 1990 U.S. Clean Air Act Amendments (CAAA) presents the first real test of the wisdom of economists' advice. This paper provides an overview of the origins, design, and performance of the U.S. acid rain program, and an analysis of its specific features and its adaptability as a model for addressing other pollution problems, such as control of NOX or CO2 emissions. The program also has resulted in innovation through changes in organizational technology, in the organization of markets, and through experimentation at individual boilers, much of which arguably would...
Tipo: Working or Discussion Paper Palavras-chave: Emission trading; Cap and trade; Air pollution; Cost-benefit analysis; Electricity; Particulates; Sulfur dioxide; SO2; Health benefits; Acid rain; Environmental Economics and Policy; Q25; Q4; D62; Q28.
Ano: 2003 URL: http://purl.umn.edu/10665
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Understanding the Risk to Neotropical Migrant Bird Species of Multiple Human-Caused Stressors: Elucidating Processes Behind the Patterns. Ecology and Society
Hames, Ralph S.; Cornell Laboratory of Ornithology; rsh5@cornell.edu; Lowe, James D.; Cornell Laboratory of Ornithology; jdl6@cornell.edu; Swarthout, Sara Barker; Cornell Laboratory of Ornithology; sb65@cornell.edu; Rosenberg, Kenneth V.; Cornell Laboratory of Ornithology; kvr2@cornell.edu.
Ubiquitous human-caused changes to the environment act as multiple stressors for organisms in the wild, and the effects of these stressors may be synergistic, rather than merely additive, with unexpected results. However, understanding how focal organisms respond to these stressors is crucial for conservation planning for these species. We propose a paradigm that alternates extensive, broadscale data collection by volunteer collaborators to document patterns of response, with intensive fine-scale studies by professional researchers, to elucidate the processes underlying these patterns. We demonstrate this technique, building on our existing work linking patterns of population declines in the Wood Thrush (Hylocichla mustelina) to synergistic effects of acid...
Tipo: Peer-Reviewed Reports Palavras-chave: Multiple scales; Synergistic effects; Citizen science; Habitat fragmentation; Acid rain; Forests; Anthropogenic change; Soil; Calcium; Invertebrates.
Ano: 2006
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