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In Pakistan, solid waste management (SWM) is considered to be a serious problem, with most of the hazardousand non-hazardous waste being dumped in landfills without any segregation. The key objective of our research was to select a suitable landfill site that is environmentally sound, economically feasible and socially acceptable for metropolitan Lahore. Lahore District is located in one of the world's largest fluvial plains, namely the Indo-Gangetic meandering rivers system plain. There is only one functional landfill site situated in the northern part of the city. Multi-criteria decision aid (MCDA) and geographical information system were combined and used in this research that blends two aggregation methods: weight linear combination (WCL) and assigning criteria weights. The analytical hierarchy process (AHP) pair-wise comparison method was applied for assigning weights to the 9 delineated criteria. The result of the analysis show that 7 (6.26% highly suitable) possible sites are available that are greater than 50 ha in area. The selected potential landfill locations were contrasted with each other in connection to their land size, distance from nearby settlements and from the city center. The result shows that site number 6, with a weight of 0.22 (22.21%), is the most suitable location for a landfill site in Lahore. In addition, landfill site 4 is considered the least preferable site due to its weight. This site has the least environmental and social impacts, as it is at a reasonable distance from settlements and is at the same time comparatively closer to the city center. This study highlights the importance of the landfill siting process for the fluvial plain and helps in decision making.

This study combines air pollution tolerance index (APTI) and anticipated performance index (API) in order to determine the potential of trees and ornamental shrubs that are frequently growing on the roads of Quetta, Pakistan, and the campus of the University of Balochistan, in Quetta, for green belt development. Our investigation exposed that not only APTI is suitable for the fitness of trees for building green belts. It is used to categorize vulnerable plant species for only bio-monitoring. The grouping of APTI and API in the present study is a practical technique for decreasing air pollution control. Laboratory analysis for APTI was carry out by the four physico-biological factors such as leaf extract pH, total chlorophyll content, ascorbic acid content, and relative water content. API for different plant species (trees and ornamental shrubs) was determined depending upon the characteristic grading by allotted + or-to the plants. The standard for determining API is given in Table 2. For examining the relationships among these factors statistics were utilized. This study indicated that the APTI is used as an instrument for choosing suitable plants to reduce environmental urban heat. API designated that Morus alba L., Pinus halepensis Miller, Ficus carica L., and Pistacia vera L. with API = 6 are excellent performers for green belt development. Morus nigra L. and Malus pumila Miller had API 5 and are considered very good performers, and Fraxinus angustifolia Vahl., Prunus armeniaca L., and Platycladus orientalis L. showed 4 API values with good performance for green belt formation. All the other remaining investigated trees and ornamental shrubs demonstrated poor values of API

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Due to the continuous population growth, uneven distribution of water resources, periodic droughts, and water pollution, it is very important to develop water treatment and recycling technologies for economic, effective, and fast water treatment and reclamation. Different types of water treatment and recycling techniques and their basic principles, applications, costs, maintenance, and suitability are discussed. In addition, a systematic approach to water treatment and recycling, involving understanding, evaluating, and selecting parameters, is presented. A comparison of the technologies is discussed from the view points of performance, sludge production, life cycle, operation, and maintenance. Brief guidance for selecting appropriate technologies for specific applications is also evaluated.