Understanding the drivers of energy and material flows of cities is important for addressing global environmental challenges. Accessing, sharing, and managing energy and material resources is particularly critical for megacities, which face enormous social stresses because of their sheer size and complexity. Here we quantify the energy and material flows through the world’s 27 megacities with populations greater than 10 million people as of 2010. Collectively the resource flows through megacities are largely consistent with scaling laws established in the emerging science of cities. Correlations are established for electricity consumption, heating and industrial fuel use, ground transportation energy use, water consumption, waste generation, and steel production in terms of heating-degree-days, urban form, economic activity, and population growth. The results help identify megacities exhibiting high and low levels of consumption and those making efficient use of resources. The correlation between per capita electricity use and urbanized area per capita is shown to be a consequence of gross building floor area per capita, which is found to increase for lower-density cities. Many of the megacities are growing rapidly in population but are growing even faster in terms of gross domestic product (GDP) and energy use. In the decade from 2001–2011, electricity use and ground transportation fuel use in megacities grew at approximately half the rate of GDP growth.

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The Pakistani Construction Industry has always been of economic and social significance to the country. In contrast to the prospective share of Pakistani construction in the local and global economic market, conversely, the development of the sector has not been at par with the market demands. With the recent rapid economic growth of the country, Pakistan now offers a growing market for the construction industry. The Government of Pakistan has responded to this opportunity by planning extensive infrastructure expansion programs. All of these programs have the potential to lead the local Industry to establish respect, status and international recognition when the appropriate efforts are extended to achieve the same. Even with the opportunity for growth the challenges will be extensive. This research presents the current state of performance of Pakistani Construction Industry and provides directions for strategic improvement of the construction industry on a sustainable basis. Major findings of the research include: a cultural and behavioral shift in the mind-set of all participants in the construction process especially top management is necessary if the construction industry is to improve its performance and competitiveness; the “boom cycle” and corresponding shortage of labor trades has increased the need for industry participants to adopt and apply construction project management philosophy, tools and techniques to help them manage the industry performance and productivity in a sustainable long-term mode. The major obstacles to improving the performance of Pakistani construction industry were found to be lack of expertise/resources in construction project management and its applied areas. A rigid attitude and behavior of executive management toward quality, safety and risk management, plus more management and emphasis on employees’ commitment toward project performance, better education and training to drive the improvement process, and tendency to cure the cause of the problem rather than the symptom. If coordination, teamwork, productivity and industry performance in the long run is going to improve, then extensive awareness and training programs to improve the clients’ understanding and approach toward construction project management must be initiated without exception.