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31.
Hassan Muhammad Shahid Mahmood Haider Javaid Anam 《Environmental science and pollution research international》2022,29(30):45204-45220
Environmental Science and Pollution Research - Energy plays a vital role in promoting sustainable economic development in complex societies. This study has analyzed the impact of electricity... 相似文献
32.
Measurements of carbonyls and C2–C6 non-methane hydrocarbons (NMHCs) were made in ambient air at a rural site at the summit of Whiteface Mountain (WFM) in New York State. Alkanes dominated in the samples, with ethane and propane making up about 55% of the total on a carbon-atom basis. Ethane, the longest-lived of the NMHCs, showed a mixing ratio in the range of 0.86–2.1 ppbv. Photochemical ageing analysis indicated an anthropogenic influence on the NMHC levels. The photochemical reactivity of the hydrocarbons, calculated in terms of propylene-equivalent concentration, was dominated by alkenes (propene and ethene), which accounted for 74% of the total NMHC sum. Air mass back-trajectories have been used to investigate the origin of the observed NMHCs and carbonyls. Higher concentrations were found when air masses arrived from the midwestern US corridor. Acetone was the most abundant species, comprising from 31% to 53% of the total detected carbonyls, followed by MEK (15–53%), HCHO (7–39%), and CH3CHO (7–19%). Average concentrations were determined to be 1.61 ppbv for CH3C(O)CH3, 1.40 ppbv for MEK, 1.16 ppbv for HCHO, and 0.49 ppbv for CH3CHO. The variations in carbonyl concentrations were observed to follow patterns similar to variations in O3 concentrations, typical of secondary products. Correlations and statistical analysis of the carbonyls and NMHCs were performed, and showed that most of the compounds derived from mixing and photochemical transformation of long-range transported pollutants from the major source areas. Ranking of the carbonyls with respect to removal of the OH radical showed HCHO to be the most important species, followed by CH3CHO, MEK, and CH3C(O)CH3. 相似文献
33.
Buledi Jamil Ahmed Amin Sidra Haider Syed Iqleem Bhanger Muhammad Iqbal Solangi Amber R. 《Environmental science and pollution research international》2021,28(42):58994-59002
Environmental Science and Pollution Research - The extensive release of heavy metals into the natural water bodies has become globally prevalent from past few decades. Heavy metal toxicity is... 相似文献
34.
The interdependence of social and ecological processes is broadly acknowledged in the pursuit to enhance human wellbeing and prosperity for all. Yet, development interventions continue to prioritise economic development and short-term goals with little consideration of social-ecological interdependencies, ultimately undermining resilience and therefore efforts to deliver development outcomes. We propose and advance a coevolutionary perspective for rethinking development and its relationship to resilience. The perspective rests on three propositions: (1) social-ecological relationships coevolve through processes of variation, selection and retention, which are manifest in practices; (2) resilience is the capacity to filter practices (i.e. to influence what is selected and retained); and (3) development is a coevolutionary process shaping pathways of persistence, adaptation or transformation. Development interventions affect and are affected by social–ecological relationships and their coevolutionary dynamics, with consequences for resilience, often with perverse outcomes. A coevolutionary approach enables development interventions to better consider social–ecological interdependencies and dynamics. Adopting a coevolutionary perspective, which we illustrate with a case on agricultural biodiversity, encourages a radical rethinking of how resilience and development are conceptualised and practiced across global to local scales. 相似文献
35.
Hashmi Shujahat Haider Fan Hongzhong Fareed Zeeshan Shahzad Farrukh 《Environmental science and pollution research international》2021,28(11):13404-13424
Environmental Science and Pollution Research - The rapid urbanization growth has not only improved the living standards of people but also raised concerns for environmental sustainability over the... 相似文献
36.
Kongbuamai Nattapan Zafar Muhammad Wasif Zaidi Syed Anees Haider Liu Yun 《Environmental science and pollution research international》2020,27(32):40171-40186
Environmental Science and Pollution Research - This paper investigates the impact of economic growth, energy consumption, tourism, trade openness, and population density on the ecological... 相似文献
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Cyanobacterial toxins: a growing environmental concern 总被引:34,自引:0,他引:34
40.
Parekh PP Khwaja HA Khan AR Naqvi RR Malik A Khan K Hussain G 《Environmental monitoring and assessment》2002,74(3):255-262
Pakistan is one of the few countries in Asia thatcontinues to use only leaded-petrol as vehicular fuel. Theconcentration of Pb in its petrol reported in 1991 was thehighest (1.5 – 2.0 g Pb L-1) of all produced by the various Asiancountries and far exceeded the WHOs guideline of 0.15 g Pb L-1. We have undertaken a study to trace and quantify this toxicelement in the environs of Karachi, Pakistans major metropolis,having more than 30% of the nations total number of vehicles.In this article we report the Pb contents of petrol and dieselcurrently manufactured and marketed in the city. Samples of`Regular petrol collected in 1999 was found to contain 0.363 gPb L-1 (range: 0.335 – 0.390 g Pb L-1), a factor of 5 lower than thatmarketed prior to 1991. Its concentration in diesel fuel was muchlower (0.017 g Pb L-1). Based on the available statistical data onthe type and volume of vehicular traffic, we assessed that thecurrent lead emission from vehicular traffic into the atmosphereis 391 metric tons a year, which is a factor of 2.7 lower thanthat estimated for 1989. 相似文献