Accounting for toxicity risks in pollution control : does it matter?

The accounting and public release of information about industrial toxic pollution emissions is meeting increasing criticism in that these listings typically do not account for the different toxicity risks associated with different pollutants. A firm emitting a large amount of relatively harmless substance is ranked as a heavier polluter than a firm emitting a small quantity of a potent substance. Such"unweighted"rankings of firms, it is argued, may lead to misallocation of resources and a wrong prioritization of efforts in pollution control. This is a particular problem in developing countries, where sources for pollution control are typically scarce. To account for varying toxicity risk, a number of organizations have developed thresholds or exposure limits for various pollutants. But many toxicity risk factors and methods are currently available, and different risk indicators yield different results and hence priorities. So the authors review seven risk methods and construct 10 sets of toxicity risk factors from those indicators. They apply those factors to the 3,426 industrial municipalities of Brazil and explore Rio de Janeiro and Sao Paulo in detail. After ranking states and municipalities for their pollution intensity, results indicate that at the state level, risk-weighted rankings remain largely the same across the 10 sets of toxicity risk factors used in thispaper. By and large the result also holds true at the municipal level. Although at the state level the unweighted ranking is relatively similar to the risk-weighted ranking, at the municipal level significant differences were found between the risk-weighted and unweighted rankings. These findings suggest that it is important for environmental regulators to weight pollutants for their relative toxicity risk when developing priorities for pollution control efforts at the industrial or regional level. But at high levels of aggregation, the choice of indicator need not be the subject of immense debate.Public Health Promotion,Environmental Economics&Policies,Health Monitoring&Evaluation,Pollution Management&Control,Water and Industry,Health Monitoring&Evaluation,TF030632-DANISH CTF - FY05 (DAC PART COUNTRIES GNP PER CAPITA BELOW USD 2,500/AL,Sanitation and Sewerage,Water and Industry,Environmental Economics&Policies

Health effects and pesticide perception as determinants of pesticide use : evidence from Bangladesh

In a recent survey of 820 Boro (winter rice), potato, bean, eggplant, cabbage, sugarcane, and mango farmers in Bangladesh, over 47 percent of farmers were found to be overusing pesticides. With only 4 percent of farmers formally trained in pesticide use or handling, and over 87 percent openly admitting to using little or no protective measures while applying pesticides, overuse is potentially a threatening problem to farmer health as well as the environment. To model pesticide overuse, the authors used a 3-equation, trivariate probit framework, with health effects and misperception of pesticide risk as endogenous dummy variables. Health effects (the first equation) were found to be strictly a function of the amount of pesticides used in production, while misperception of pesticide risk (the second equation) was determined by health impairments from pesticides and the toxicity of chemicals used. Pesticide overuse (the third equation) was significantly determined by variation in income, farm ownership, the toxicity of chemicals used, crop composition, and geographical location. The results highlight the necessity for policymakers to design effective and targeted outreach programs that deal specifically with pesticide risk, safe handling, and averting behavior. Ideally, the approach would be participatory in nature to address key informational gaps, as well as increasing a farmers'awareness retention. The results also point to specific crops and locations experiencing a higher prevalence of overuse-bean and eggplant in general-and overall production in the districts of Chapainawabganj, Chittagong, Comilla, Jessore, Narshingdi, Rajshahi, and Rangpur. Focusing efforts in these crop and geographical areas may have the most measurable effects on pesticide overuse.Health Monitoring&Evaluation,Crops&Crop Management Systems,Agricultural Knowledge&Information Systems,Rural Development Knowledge&Information Systems,Pest Management

Stockpiles of obsolete pesticides and cleanup priorities : a methodology and application for Tunisia

Obsolete pesticides have accumulated in almost every developing country or economy in transition over the past several decades. Public health and environmental authorities are eager to reduce health threats by removing and decontaminating stockpile sites, but there are many sites, cleanup can be costly, and public resources are scarce. Under these conditions, it seems sensible to develop a methodology for prioritizing sites and treating them sequentially, as budgetary resources permit. This paper presents a methodology that develops cleanup priority indices for Tunisia. The approach integrates information on populations at risk, their proximity to stockpiles, and the relative toxic hazards of the stockpiles. The robustness of this approach is tested by varying model parameters widely and testing for stability in the rank-ordering of results.Information Security&Privacy,Food&Beverage Industry,Population Policies,Environmental Governance,Disease Control&Prevention

Is environmentally-friendly agriculture less profitable for farmers ? evidence on integrated pest management in Bangladesh

Concerns about the sustainability of conventional agriculture have prompted widespread introduction of integrated pest management (IPM), an ecologically-based approach to control of harmful insects and weeds. IPM is intended to reduce ecological and health damage from chemical pesticides by using natural parasites and predators to control pest populations. Since chemical pesticides are expensive for poor farmers, IPM offers the prospect of lower production costs and higher profitability. However, adoption of IPM may reduce profitability if it also lowers overall productivity, or induces more intensive use of other production factors. On the other hand, IPM may actually promote more productive farming by encouraging more skillful use of available resources. Data scarcity has hindered a full accounting of IPM's impact on profitability, health, and local ecosystems. Using new survey data, the authors attempt such an accounting for rice farmers in Bangladesh. They compare outcomes for farming with IPM and conventional techniques, using input-use accounting, conventional production functions, and frontier production estimation. All of their results suggest that the productivity of IPM rice farming is not significantly different from the productivity of conventional farming. Since IPM reduces pesticide costs with no countervailing loss in production, it appears to be more profitable than conventional rice farming. The interview results also suggest substantial health and ecological benefits. However, externality problems make it difficult for farmers to adopt IPM individually. Without collective adoption, neighbors'continued reliance on chemicals to kill pests will also kill helpful parasites and predators, as well as exposing IPM farmers and local ecosystems to chemical spillovers from adjoining fields. Successful IPM adoption may therefore depend on institutional support for collective action.Agricultural Knowledge&Information Systems,Agricultural Research,Water Conservation,Sustainable Land and Crop Management,Environmental Economics&Policies,Crops&Crop Management Systems,Sustainable Land and Crop Management,Agricultural Knowledge&Information Systems,Agricultural Research,Environmental Economics&Policies

Pesticide traders'perception of health risks : evidence from Bangladesh

As pesticide traders are important sources of information about the health impacts of pesticides, a crucial understanding of their perception is necessary toguide further pesticide information dissemination efforts through this channel. To this end, a 2003 survey of 110 Bangladeshi pesticide traders was conducted with questions on the pesticides in stock, knowledge and training in pesticide use and handling, sources of information, protective measures, and health effects. A two-equation bivariate probit model was initially estimated for health impairment and trader perception with health effects as an endogenous regressor in the perception equation. Results indicate that pesticide toxicity, exposure in terms of number of years spent in the pesticide business, trader's age (experience), and the interaction between the most harmful pesticides and training received in pesticide use and handling were the significant determinants of health impairment status. Risk perception was determined by actual health impairment status, pesticide toxicity, the average number of hours spent in the shop per day, training, and the interaction term between highly toxic substances and training. The evidence suggests that the current information content may not be effective, and thus training programs should be revised with a greater emphasis on health hazards and averting behavior.Health Monitoring&Evaluation,Fertilizers,Fertilizers&Agricultural Chemicals Industry,Agricultural Knowledge&Information Systems,Rural Development Knowledge&Information Systems

Environment as cultural heritage: the Armenian diaspora's willingness-to-pay to protect Armenia's Lake Sevan

This paper presents a study of willingness-to-pay of the Armenian Diaspora in the United States to protect Armenia's Lake Sevan, a unique and precious symbol of the Armenian cultural heritage. Dichotomous choice contingent valuation questions were asked by mail surveys to elicit respondents'willingness to pay for the protection of Lake Sevan. The results show that on average, each household of the Armenian Diaspora in the United States would be willing to provide a one-time donation of approximately US$80 to prevent a further degradation of Lake Sevan, and approximately US$280 to restore the quality of the lake by increasing its water level by 3 meters.Water Conservation,Cultural Heritage&Preservation,Public Health Promotion,Environmental Economics&Policies,Decentralization,Health Economics&Finance,Water Use,Health Monitoring&Evaluation,Environmental Economics&Policies,Water Conservation

Welfare measurement bias in household and on-site surveying of water-based recreation : an application to Lake Sevan, Armenia

Studies comparing household surveys with on-site interceptor surveys have typically accounted for over-sampling avid users in the on-site interceptor surveys (that is, endogenous stratification). However, these studies have typically not accounted for the possibility that the household sample may contain a large presence of zero observations. If a large proportion of the population does not recreate at the site for any value of the price vector, this inflation of zero observations leads to biased welfare estimates and an inadequate comparison with the on-site survey. In this paper, the authors estimate and compare three models which correct for these measurement issues in both the household and on-site surveys. Results from an application to recreation at Lake Sevan (Armenia) indicate that household consumers'surplus is not statistically different from that of the on-site survey once the authors account for zero-inflation in the household sample and endogenous stratification in the on-site sample.Transport Economics Policy&Planning,Economic Theory&Research,Science Education,Scientific Research&Science Parks,Roads&Highways

Public disclosure of environmental violations in the Republic of Korea

Since 1989, environmental authorities of the Republic of Korea have published on a monthly basis a list of enterprises violating the country's environmental rules and regulations. This may be the longest environmental public disclosure program currently in existence. Over the period 1993-2001 in excess of 7,000 violations have been recorded in these monthly violation lists, involving more than 3,400 different companies. In this paper, the authors provide a comprehensive descriptive analysis of this dataset. Results suggest that the news media have given an important, though perhaps declining coverage, to the violation lists, with a focus on publicly traded companies, failures to operate pollution abatement equipment, and prosecutions.Environmental Economics&Policies,Health Monitoring&Evaluation,Decentralization,Public Health Promotion,Water and Industry,Environmental Economics&Policies,Health Monitoring&Evaluation,Water and Industry,Health Economics&Finance,National Governance

The poverty/environment nexus in Cambodia and Lao People's Democratic Republic

Environmental degradation can inflict serious damage on poor people because their livelihoods often depend on natural resource use and their living conditions may offer little protection from air, water, and soil pollution. At the same time, poverty-constrained options may induce the poor to deplete resources and degrade the environment at rates that are incompatible with long-term sustainability. In such cases, degraded resources may precipitate a downward spiral, by further reducing the income and livelihoods of the poor. This"poverty/environment nexus"has become a major issue in the recent literature on sustainable development. In regions where the nexus is significant, jointly addressing problems of poverty and environmental degradation may be more cost-effective than addressing them separately. Empirical evidence on the prevalence and importance of the poverty/environment nexus is sparse because the requisite data are often difficult to obtain in developing countries. The authors use newly available spatial and survey data to investigate the spatial dimension of the nexus in Cambodia, and Lao People's Democratic Republic. The data enable the authors to quantify several environmental problems at the district and provincial level. In a parallel exercise, they map the provincial distribution of poor households. Merging the geographic information on poverty and the environment, the authors search for the nexus using geo-referenced indicator maps and statistical analysis. The results suggest that the nexus is country-specific: geographical, historical, and institutional factors may all play important roles in determining the relative importance of poverty and environment links in different contexts. Joint implementation of poverty and environment strategies may be cost-effective for some environmental problems, but independent implementation may be preferable in many cases as well. Since the search has not revealed a common nexus, the authors conclude on a cautionary note. The evidence suggests that the nexus concept can provide a useful catalyst for country-specific work, but not a general formula for program design.Health Economics&Finance,Environmental Economics&Policies,Agricultural Research,Public Health Promotion,Health Monitoring&Evaluation,Environmental Economics&Policies,Health Monitoring&Evaluation,Poverty Assessment,Energy and Environment,Agricultural Research

The economics of renewable energy expansion in rural Sub-Saharan Africa

Accelerating development in Sub-Saharan Africa will require massive expansion of access to electricity -- currently reaching only about one-third of households. This paper explores how essential economic development might be reconciled with the need to keep carbon emissions in check. The authors develop a geographically explicit framework and use spatial modeling and cost estimates from recent engineering studies to determine where stand-alone renewable energy generation is a cost effective alternative to centralized grid supply. The results suggest that decentralized renewable energy will likely play an important role in expanding rural energy access. But it will be the lowest cost option for a minority of households in Africa, even when likely cost reductions over the next 20 years are considered. Decentralized renewables are competitive mostly in remote and rural areas, while grid connected supply dominates denser areas where the majority of households reside. These findings underscore the need to de-carbonize the fuel mix for centralized power generation as it expands in Africa.Energy Production and Transportation,Climate Change Mitigation and Green House Gases,Transport Economics Policy&Planning,Power&Energy Conversion,Carbon Policy and Trading