Influence of different air pollutants on concentration of PM 2.5  in national capital region (NCR), India

The exacerbation of climate change impacts within metropolitan areas is a well-documented phenomenon, often leading to severe consequences that pose significant risks to human populations. The impact of urban vegetation and planting design on these factors can be observed. However, it is worth mentioning that while there is an extensive body of literature on the consequences of climate change, there is a relatively small number of studies specifically focused on examining the role of vegetation as a mitigating factor in urban environments. This review paper aims to critically examine existing studies pertaining to the role of urban vegetation in mitigating the detrimental effects of the urban environment. The objective is to offer practical recommendations that can be implemented by city planners. By conducting a comprehensive examination of the literature available in Scopus, Web of Science, and Google Scholar, employing specific keywords pertaining to urban vegetation and climate change, we have identified five prominent concerns pertaining to the urban environment. These concerns encompass particulate matter, gaseous pollution, noise pollution, water runoff, and the urban heat island effect. The present analysis highlights that the impact of urban vegetation on the negative consequences of climate change cannot be unequivocally classified as either positive or negative. This is due to the fact that the influence of urban greenery is intricately connected to factors such as the arrangement, makeup, and dispersion of vegetation, as well as the specific management criteria employed. Hence, this research has the potential to enhance comprehension of the multifaceted nature of urban green spaces and establish a solid groundwork for subsequent investigations.

Analytical study on the coupling coordination degree of tourism and urban development—Taking Shaanxi as an example

Tourism has been instrumental in fostering regional economic growth, enhancing the quality of life of residents, and boosting the image of urban areas in Shaanxi, thanks to the accelerated economic and social development of recent years. Nevertheless, the issue of aligning urban development and tourism in terms of space, resources, and the industrial chain remains a significant concern. This paper establishes an evaluation index system for tourism and urban development in the Shaanxi region from 2009 to 2019. It then employs the systematic coupling coordination model to conduct a comprehensive analysis of the coupling coordination degree of tourism and urban development in the region, as well as its various influencing factors. The study demonstrates that the coupling and coordination degree of tourism and urban development in the Shaanxi region exhibited a trend of continuous improvement from 2009 to 2019. The region underwent three stages of development: “uncoordinated development (2009–2011), transformation development (2012–2016), and coordinated development (2017–2019).” The coupling coordination level was elevated from “mild dissonance” to “intermediate coordination” in 2019. In contrast, the tourism economic development of Shaanxi cities remains unequal, as evidenced by the existence of two distinct categories of development: the “lagging tourism economy” and the “coordinated tourism economy.” The findings of this investigation indicate that the general trend of urban development and tourism in Shaanxi is favorable; however, the disparities in the progress of the tourism economy among cities necessitate additional regional coordination and cooperation. The theoretical support for the relevant research and a reference basis for tourism development planning and urban policy making are provided by the evaluation index system and the systematic coupling coordination model proposed in this paper. This will facilitate the sustainable and coordinated development of the tourism industry and cities in Shaanxi.

Influence of different air pollutants on concentration of PM_2.5 in national capital region (NCR), India

Abhishek Prasad, Pooja Maibam, Samiran Saikia, Kurme Uday Teja, Subhadeep Biswas

Article ID: 3182
Vol 6, Issue 1, 2025

DOI: https://doi.org/10.54517/ec3182

Received: 26 December 2024; Accepted: 9 April 2025; Available online: 23 April 2025; Issue release: 30 June 2025

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Abstract

Air pollution has become a hot topic, especially among megacities throughout the globe. In this context, the national capital region (NCR) of India, including Delhi and its adjoining areas, deserves special mention. Air pollutants such as sulfur dioxide (SO₂), nitrogen oxides (NO_x), ground-level ozone (O₃), carbon monoxide (CO), and particulate matter (PM_2.5, PM₁₀) are some of the important elements often making adverse impacts on the city air in recent times. Especially PM_2.5 and PM₁₀ in the NCR have come up several times in the news reports due to extremely high concentrations. The present article focuses on finding out the correlation between the concentration of PM_2.5 and other pollutants in two regions named Indirapuram and Noida, prominent locations in the NCR. The results (R²) indicate that correlation fits better when the concentration of two pollutants is compared against PM_2.5 rather than compared with a concentration of a single pollutant. In most of the cases, a positive correlation is observed, while in a few cases, a negative correlation is attained. Finally, the model is tested against some known values of independent and dependent variables.

Keywords

air pollution; PM_2.5; NCR; Indirapuram; Noida

References

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Influence of different air pollutants on concentration of PM2.5 in national capital region (NCR), India

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Influence of different air pollutants on concentration of PM_2.5 in national capital region (NCR), India