Perception and Barriers to Implementation of Intensive and Extensive Green Roofs in Dhaka, Bangladesh

Abstract

Buildings are one of the biggest consumers of fossil fuels, and thus, contribute largely to greenhouse gas emissions. As a result, a large number of studies have been conducted and innovative ideas or green solutions have been invented, adopted, and implemented across the globe. These solutions are often contextual and heavily dependent on local environmental and socio-economic factors. Green roofs are such an example. Green roofs (both intensive and extensive) for buildings have been successfully adopted in many countries around the world. Bangladesh, a developing country that can benefit from green roofs, seems to remain in complete darkness regarding its potential. The objective of this study is to identify the reasons why green roofs have not been widely implemented in Bangladesh, especially in the capital Dhaka, even though, theoretically, the climatic conditions of this country favor this technology. This study focuses on the perception of the construction industry to comprehend the possible obstacles they are facing towards using green roofs in their designs. A questionnaire study was conducted among architects, engineers, construction managers, contractors, and owners who are at different levels of experience in their respective fields. The results indicate a gap in knowledge and misconceptions, which are major hindrances to the implementation of green roofs.

Preparation of activated carbon from biomass and its’ applications in water and gas purification, a review

“…In addition to the liquid substances, activated carbon is also found effective in gas adsorptions as the burning of fossil fuel produces greenhouse gases (GHG) and polluted gases in the environment with the increase of energy demand ( Afroze et al, 2018; A. Ahmed et al, 2018a;Hossain et al, 2019 ). In Table 13, it has shown, AC is one of the promising solid adsorbents that can be utilized to adsorb CO 2 , CH 4 , H 2 S, NO 2 and H 2 gases due to its many advantages like low cost, easy regeneration, insensitivity towards moisture, high gas adsorption capacity at normal atmosphere, high surface area, sufficient pore size distribution, high mechanical stability as well as very low energy requirement (Ogungbenro, Quang, Al-Ali, & Abu-Zahra, 2017).…”

Biochar characterization of invasive Pennisetum purpureum grass: effect of pyrolysis temperature

“…Global warming and environmental pollution are related to the combustion of fossil fuels, which emits CO 2 as well as sulfur and nitrogen oxides (Afroze et al 2018;Ahmed et al 2018b;Radenahmad et al 2020). Rising oil prices, reducing fossil fuel storage and environmental pollution are the major reasons for developing alternative green energy sources (Cha et al 2016;Hossain et al 2019;Afroze et al 2020a). The sources that can replace fossil fuels are biomass, geothermal, hydro, wind, sunlight and ocean energy; biomass is the most active and available feedstock that can contribute to 14% of the energy demand of the world (Ahmed et al 2018a).…”

Stakeholder Perception and Institutional Approach to Rooftop Gardening (RTG) of Urban Areas in Dhaka, Bangladesh

“…The number of building in urban areas is continuously increasing; there are approximately 400000 buildings in Dhaka city and an average of 1593 sq feet per household. All rooftop structures in Bangladesh are Reinforced Concrete Coarse (RCC) type and can bear heavy loads, favoring rooftop gardening in Bangladesh (Hossain et al, 2019;Pramanik, 2013). Thus, rooftop urban areas are becoming an opportunity to increase cultivable spaces in the country (Uddin et al 2016).…”