Ship Air Emission and Their Air Quality Impacts in the Panama Canal Area: An Integrated AIS-Based Estimation During Hotelling Mode in Anchorage Zone

To control emissions from vessels, the establishment of emission inventories is a basic work. The paper first calculates emission inventory from vessels in the Pearl River Delta (PRD) region using the bottom-up method based on Automatic Identification System (AIS) data, then analyses the emission characteristics, and based on which, the reduction effect of several emission control measures is discussed. The results of the study show that vessels in the PRD region emitted a total of 18,900 tons of SO2, 284,800 tons of NOx, 24,300 tons of PM10, 70,800 tons of HC, and 18,400 tons of CO in the year of 2017; emissions of atmospheric pollutants are highest under the mode of Slow-steaming, and lowest under the mode of Anchored; emissions from vessels are mainly concentrated in the port area and near the channel; China’s scheme of domestic emission control areas (DECAs) for vessels can have a good effect on sulfur oxide control.

The air quality in Afghanistan is severely affected by various pollutant sources, the impacts of which often cause acute health problems, particularly among the old, young and those suffering from poor health. The impacts of chronic exposure to air pollutants are also likely to become apparent over time. The purpose of this air quality dissertation is to assist policy makers in the design and implementation of policies, and in the development of monitoring and management tools to restore air quality in Afghanistan. Since 2001, Kabul city’s population has grown from four hundred thousand to six million people. Estimates of various pollutant emissions indicate that vehicular traffic, windblown dust, brick kilns, residential heating during winter season, and domestic and commercial generators are the major sources of air pollution in Kabul. The estimated total annual emissions in Kabul are 17,363 tons of PM10, 16,183 tons of NOx, 2,484 tons of SO2, 97,068 tons of CO2, and 650,846 tons of CO2 .In the article “In Kabul, air pollution a bigger killer than war” that every year around 3,000 people die in Kabul city due to air pollution whereas the total mortality rate due to war across the country is 2,777 cases.

In this work the environmental benefits in the atmospheric emissions after the implementation of 3,000 MW nuclear power plants were assessed and presented. To determine the quantity of avoided emissions of CO2, NOx, SO2 and Hg compounds, harmonised stoichiometric combustion model dedicated to solid fuel fired power plant was created. To increase the credibility of the studies, future strict emission standards (Directive 2010/75/EU, BAT documents for LCP) were included as well. In conducted studies, representative samples of 3 different Polish solid fuels were examined (by comprehensive proximate and ultimate analysis) and used in assessment. It was proven that by the replacement of thermal solid fuel power plant by nuclear unit (with annual production rate of 22.4 TWh net) up to 16.4 million tonnes of lignite, 8.9 million tonnes of hard coal or 13.1 million tonnes of solid biomass can be saved. Further, for the case of lignite, the emission, at least, of 21.29 million tonnes of CO2 (6.9% of all Polish emission in 2015), 1,610 tonnes of dust (0.4%), 16,102 tonnes of NOx (2.2%), 16,102 tonnes of SO2 (2.0%) and 564 kg of mercury (5.9%) can be avoided. For selected hard coal, calculated emission savings were equal to 17.60 million tonnes of CO2 (5.7%), 1,357 tonnes of dust (0.4%), 13,566 tonnes of NOx (1.9%), 13,566 tonnes of SO2 (1.7%), 271 kg of mercury (2.9%), and for biomass - equal to 20.04 million tonnes of CO2 (6.5%), 1,471 tonnes of dust (0.4%), 14,712 tonnes of NOx (2.0%), 14,712 tonnes of SO2 (1.8%) and 294 kg of mercury (3.1%).

In recent years, maritime activity has been identified as an important source of emission of atmospheric pollutants, of which the high impact on the environment and human health has been verified, mainly in port cities. The emissions generated depend mainly on the ship's operating mode (Hotelling, Maneuvers and Cruising) and the quality of the fuel used. In this sense, the lack of studies in the Colombian territory is worrying, even more so when it does not have control mechanisms due to null legislation on environmental emissions for these sources. Given this absence, this work seeks to generate quantitative information through the estimation of emissions of: SO2, NOx, Particulate Material (PM10, PM2.5), Hydrocarbons (HC), Volatile Organic Compounds (VOC), CO, CO2, CH4, and N2O, using the “Bottom up” methodology for Container, Bulk and General Cargo vessels arriving at the Barranquilla Fluvial Terminal throughout the year 2018, in order to make a preliminary diagnosis of the current situation of the port. For the study year, it was observed that a total of 651 motor ships arrived, of which they were determined as total emissions: 4583.18 tons of NOx, 1417.34 tons of SO2, 182.52 tons of PM10, 179.42 tons of PM2.5, 87.10 ton of HC, 155.84 ton of Volatile Organic Compounds other than Methane (MNVOC), 136.19 ton of CO, 105 677.85 ton of CO2, 0.77 ton of CH4 and 4.95 ton of N2O.

Challenges of aligning district heating structures with climate goals across China's provinces.

In Chhattisgarh, Raipur-Durg-Bhilai (RDB) tri-city area hosts the new administrative capital of the state, interconnected by an expressway forming the industrial corridor and is one of the largest steel manufacturing hubs in India. Between 1998 and 2016, the satellite and global model data derived concentrations show a 50% increase in the overall PM2.5 pollution in the region. The average PM10 concentration measured at commercial, industrial, and residential monitoring stations is 125 ± 52 µg m–3 in 2015. None of the stations currently measure PM2.5. The annual average PM10 concentrations in 2011 is 175 ± 110 µg m–3, which translates to 28% improvement in 5 years. A multiple pollutant emissions inventory was established for this urban airshed (extending 60 km × 30 km), with annual estimates of 41,500 tons of PM2.5, 59,650 tons of PM10, 7,600 tons of SO2, 67,000 tons of NOx, 163,300 tons of CO, 118,150 tons of NMVOCs, and 3.1 million tons of CO2 for 2015, and further projected to 2030 under business as usual conditions. The ambient source contributions were calculated using WRF-CAMx chemical transport modeling system, highlighting the heavy industries (mostly steel) (23%), followed by transport (including on road dust) (29%), domestic cooking and heating (12%), open waste burning (6%), as the key air pollution sources in the urban area. The city has an estimated 26% of the ambient annual PM2.5 pollution originating outside the urban airshed - this contribution is mostly coming from the coal-fired power plants, large (metal and non-metal processing) industries, and brick kilns located outside the urban airshed and seasonal open biomass fires.

Food waste (FW) has a substantial environmental impact, contributing to 4.4 GtCO2 eq annually, equivalent to approximately 8% of total anthropogenic greenhouse gas emissions based on carbon footprints. Indonesia ranks as the world's second-largest food waste producer, estimated to generate 300 kg of food waste per capita per year. However, there is a scarcity of studies assessing the electricity generation potential and economic feasibility of biogas-to-electricity projects in Indonesia. This paper presents the recovery of biogas from food waste for electricity generation, aiming to determine its economic and environmental benefits for Jakarta, Indonesia. The food waste generation potential in Jakarta was estimated from 2024 to 2043, and the theoretical methane yield was calculated using Buswell's equation. The economic feasibility of anaerobic digestion projects was analyzed using various methods, including total life cycle cost, net present value, investment payback period, levelized cost of energy, and internal rate of return. Environmental impact assessment included air pollution (SO2, NOx, and PM10) and greenhouse gas (CO2 and CH4) emissions reduction. Methane yield from anaerobic digestion was determined to range from 315.9 to 616.5 × 106 m3/yr, with electricity generation potential between 721.5 and 1,407.9 Gigawatt-hours. Economic indicators demonstrated the viability of anaerobic digestion, with positive net present values. The net present value and levelized cost of energy for anaerobic digestion were $162.8 million and $0.095 per kilowatt-hour, respectively. Utilizing biogas from anaerobic digestion for electricity generation could displace 8.2 million tons of coal over the system's lifespan. This displacement would lead to reductions of 17.8 million tons of SO2, 13.9 million tons of NOx, 1.7 million tons of PM10, and 20.1 million tons of CO2 compared to coal combustion.AcknowledgmentsThis research was supported by Particulate Matter Management Specialized Graduate Program through the Korea Environmental Industry & Technology Institute (KEITI) funded by the Ministry of Environment (MOE).

Air quality, emissions, and source contributions analysis for the Greater Bengaluru region of India

Comparison of the cost-effectiveness of eliminating high-polluting old vehicles and imposing driving restrictions to reduce vehicle emissions in Beijing

Air pollution, owing to the ever-increasing transport vehicle fleet, and adverse health effects are increasing in provinces of Thailand. The study estimated that the vehicle fleet size of Nakhon Ratchasima (NR) province of Thailand will grow to 2 million vehicles by 2030, which was 1.36 million in 2021. In NR, the PM2.5 and PM10 concentrations already surpassed both WHO and NAAQS guidelines in 2019–2021. Using Pollution Control Department (PCD) approved Tier I and II Methodology of EMEP/EEA, this research estimated that the total tailpipe emission load will be 1039 tons of PM2.5, 16,630 tons of NO₂, 20,623 tons of CO, 195 tons NH₃, and 249 tons of SO₂ in NR during 2030. The emission load will increase to 1752 tons of PM2.5, 21,126 tons of NO2, 25,559 tons of CO, 361 tons of NH3 and 9344 tons of SO₂ during 2030 if upstream emissions are considered. This study has developed five control scenarios in line with the directives of PCD to mitigate the adverse health from vehicle-led air pollution in NR and implementation during 2024–2030.According to the study, different control scenarios to be implemented during 2024–2030, will be able to keep the fleet size of vehicles in the NR under control. The results show that the control scenarios will keep the annual tailpipe emission of PM2.5 at 604 tons in 2030, a 42 % reduction over the 2030 Business-As-Usual scenario (BAU). The health damage in the range of 6941 to 11,625 disability-adjusted life years (DALYs) under the 2030 BAU scenario in NR due to tailpipe and upstream emissions can be reduced to 4162–7318 DALYs with the implementation of different control scenarios. The control scenarios will also provide significant economic benefits ranging from 4465 to 6718 million THB during 2024–2030 through reduced DALYs and associated costs.

The northwestern portion of the Mexican territory has a semiarid climate with scarce rains and no reliable water supply sources. The cities of Tijuana, Tecate and Rosarito, Baja California, Mexico, are located within this zone and depend on the Ri´o Colorado–Tijuana Aqueduct to fulfill approximately 90% of its water demand. This large hydraulic facility is 147 km long and elevates 4.0 m3/s of water at a height of 1,060 m. It is composed of 6 pumping stations with a total installed motor capacity of 79,500 hp. At this time the capacity of the aqueduct is being increased to 5.33 m3/s by means of installing an additional pump to each pumping station and a 54″ parallel line. The motor capacity increase will be of 26,500 hp. In 2009, its electricity consumption was of 433,589 MWh at a cost of $29,494,630 USD. Emissions to the atmosphere associated to this electricity consumption were calculated to be: 73 tonnes of SO2, 73 tonnes of NOx and 116,467 tonnes of CO2. This paper presents the methodology used to evaluate the potential savings of electricity and emissions and recommends alternatives to decrease its current energy consumption. Results obtained show that 35,949 MWH at a cost of $2,762,300 USD can be saved annually if the equipment performance were at its optimal efficiency. Emissions to the atmosphere avoided would be of 9,656 tonnes of CO2, 6 tonnes of SO2 and 17 tonnes of NOx.

Air quality degradation due to road traffic emissions is one of the topics of major interest for the scientific community and urban planners worldwide. Cabo Verde does not have regulations for traffic emission control or air quality guidelines, although the number of road vehicles has grown steadily over the past decade. Moreover, studies focusing on the impact of road transport on air quality in this archipelago are sparse. In this study, we present a first detailed air pollutant inventory of road traffic emissions through a bottom-up methodology, along with snapshots of the state of air quality on the islands of Santiago, São Vicente, and Sal. For the year 2017, emission estimates for the main island (Santiago) are 654 tons of CO, 35 tons of PM10, 562 tons of NOx, and 84 tons of NMVOCs. The air quality assessment was carried out using the TAPM model for a period of 6months from January to July 2017. The results showed that the mean concentration values for Sao Vicente, Sal, and Santiago Islands ranged between 2.0 and 18μgm-3 for NO2 and 3.8 and 5.6μgm-3 for PM10. NO2 concentrations show an increasing trend from January to July in Santiago and Sal, and no clear trend in São Vicente Island. The simulated PM10 concentrations showed values in the same range over the year, even though they appeared slightly higher in July than in January. It was observed that both NO2 and PM10 average concentrations have been consistently above healthful levels, according to air quality guidelines fixed by the WHO.

The environmental co-benefit and economic impact of China's low-carbon pathways: Evidence from linking bottom-up and top-down models

Increasing residential insulation can decrease energy consumption and provide public health benefits, given changes in emissions from fuel combustion, but also has cost implications and ancillary risks and benefits. Risk assessment or life cycle assessment can be used to calculate the net impacts and determine whether more stringent energy codes or other conservation policies would be warranted, but few analyses have combined the critical elements of both methodologies In this article, we present the first portion of a combined analysis, with the goal of estimating the net public health impacts of increasing residential insulation for new housing from current practice to the latest International Energy Conservation Code (IECC 2000). We model state-by-state residential energy savings and evaluate particulate matter less than 2.5 microm in diameter (PM2.5), NOx, and SO2 emission reductions. We use past dispersion modeling results to estimate reductions in exposure, and we apply concentration-response functions for premature mortality and selected morbidity outcomes using current epidemiological knowledge of effects of PM2.5 (primary and secondary). We find that an insulation policy shift would save 3 x 10(14) British thermal units or BTU (3 x 10(17) J) over a 10-year period, resulting in reduced emissions of 1,000 tons of PM2.5, 30,000 tons of NOx, and 40,000 tons of SO2. These emission reductions yield an estimated 60 fewer fatalities during this period, with the geographic distribution of health benefits differing from the distribution of energy savings because of differences in energy sources, population patterns, and meteorology. We discuss the methodology to be used to integrate life cycle calculations, which can ultimately yield estimates that can be compared with costs to determine the influence of external costs on benefit-cost calculations.

BackgroundMethodological limitations make it difficult to quantify the public health benefits of energy efficiency programs. To address this issue, we developed a risk-based model to estimate the health benefits associated with marginal energy usage reductions and applied the model to a hypothetical case study of insulation retrofits in single-family homes in the United States.MethodsWe modeled energy savings with a regression model that extrapolated findings from an energy simulation program. Reductions of fine particulate matter (PM2.5) emissions and particle precursors (SO2 and NOx) were quantified using fuel-specific emission factors and marginal electricity analyses. Estimates of population exposure per unit emissions, varying by location and source type, were extrapolated from past dispersion model runs. Concentration-response functions for morbidity and mortality from PM2.5 were derived from the epidemiological literature, and economic values were assigned to health outcomes based on willingness to pay studies.ResultsIn total, the insulation retrofits would save 800 TBTU (8 × 1014 British Thermal Units) per year across 46 million homes, resulting in 3,100 fewer tons of PM2.5, 100,000 fewer tons of NOx, and 190,000 fewer tons of SO2 per year. These emission reductions are associated with outcomes including 240 fewer deaths, 6,500 fewer asthma attacks, and 110,000 fewer restricted activity days per year. At a state level, the health benefits per unit energy savings vary by an order of magnitude, illustrating that multiple factors (including population patterns and energy sources) influence health benefit estimates. The health benefits correspond to $1.3 billion per year in externalities averted, compared with $5.9 billion per year in economic savings.ConclusionIn spite of significant uncertainties related to the interpretation of PM2.5 health effects and other dimensions of the model, our analysis demonstrates that a risk-based methodology is viable for national-level energy efficiency programs.