Air pollution and its economic impacts at household level: willingness to pay for environmental services in Pakistan.

Air pollution has become a major global problem. Thus, the goal of this study was to find out the economic impacts (treatment cost) of air pollution on households as well as the principal factors inducing an individual's willingness to pay for better air quality. District Faisalabad was purposively selected for sampling, as it is a major industrial hub in Pakistan. The required information was collected from 120 sampled respondents through a structured questionnaire. The ordinary least squares method was used for assessing the impact of various factors on the treatment cost of the most recent episode of ailment related to air pollution. The ordered logit model was used to assess the impacts of factors affecting the willingness to pay for programs aimed at the provision of better environmental services. The results revealed that high air pollution in the urban area resulted in more lost workdays and higher health costs. The findings also showed that people were willing to pay for better air quality in urban areas than in rural areas. Based on the findings, it is suggested that the incentive schemes may be designed for the promotion of cleaner services in rural and urban areas.

Phytoremediation strategies for soils contaminated with heavy metals: Modifications and future perspectives.

Presence of heavy metals in agricultural soils is of major environmental concern and a great threat to life on the earth. A number of human health risks are associated with heavy metals regarding their entry into food chain. Various physical, chemical and biological techniques are being used to remove heavy metals and metalloids from soils. Among them, phytoremediation is a good strategy to harvest heavy metals from soils and have been proven as an effective and economical technique. In present review, we discussed various sources and harmful effects of some important heavy metals and metalloids, traditional phytoremediation strategies, mechanisms involved in phytoremediation of these metals, limitations and some recent advances in phytoremediation approaches. Since traditional phytoremediation approach poses some limitations regarding their applications at large scale, so there is a dire need to modify this strategy using modern chemical, biological and genetic engineering tools. In view of above, the present manuscript brings both traditional and advanced phytoremediation techniques together in order to compare, understand and apply these strategies effectively to exclude heavy metals from soil keeping in view the economics and effectiveness of phytoremediation strategies.