Recently, research on innovative approaches to and practices for plastic waste management in a circular economy has gained momentum. Plastic waste pollution poses a serious environmental concern. At the same time, the cement industry is among the biggest sources of CO2 emissions, which poses another environmental challenge. This makes plastic sand bricks an attractive alternative to concrete blocks and bricks. This paper looks at the recent studies regarding the development of plastic sand bricks and the different percentages of plastic and sand used in the bricks. The literature review reveals that there is a lack of studies that evaluate plastic sand construction materials from an economic perspective. Such studies are essential if the industry is to invest in and adopt this alternative construction material. Plastic sand bricks could be a workable solution for combating issues related to solid waste. The compressive strength decreased with increasing ratios of plastic to sand. Plastic sand bricks weighed less than the conventional bricks. Issues requiring further investigation include: dealing with varying proportions and types of plastic, the lack of understanding of the long-term performance of plastic sand bricks, the flammability and fire resistance of plastic sand bricks, and the absence of appropriate standards and regulations for recycling plastic into plastic sand bricks. This paper allows us to look ahead in terms of some specific technical needs, the translation of the emerging technology into practice, and new ideas to decrease plastic pollution.

Combating climate change by reducing greenhouse gas (GHG) emissions has become an obligation for countries that ratified the Paris Agreement. Saudi Arabia, as a member of the Paris Agreement, pledged to achieve net zero emissions (NZE) by 2060. This endeavor is challenging for all countries. This paper provides an analysis and assessment of the Saudi measures to achieve NZE by 2060. The analysis reveals that Saudi Arabia will reduce the total net emissions to 49.67 Mt of CO2eq, whereas under a business-as-usual scenario, the emissions would reach 1.724 million tons (Mt) of CO2 equivalent (CO2eq). The study reveals that sectors conducting environmental, social, and governance ratings (ESG) and those where the government is a stakeholder are on the right track and will facilitate the government’s efforts in reaching NZE. The gap in reaching NZE will be mainly due to the Saudi steel and cement industries.

The circular economy (CE) has emerged as an upcoming promising solution to global sustainability. Some policymakers have issued legislations to encourage the adoption of CE, and academics have published studies addressing CE from different approaches. However, adopting CE entails a disruptive shift from a linear economy to a closed-loop economy, where economic growth is decoupled from consumption growth. Though it is difficult to develop a uniform, structured approach for incorporating CE into procurement, this paper attempts to fill the current knowledge gap by proposing a holistic framework to embed CE into the procurement process. The procurement ecosystem is very complex, and this study accordingly dismantles the ecosystem into basic components. The integration of CE for each component is addressed separately. Propositions have then been developed for each element within the procurement ecosystem to embrace CE. The research findings suggest that governments can play an important role in promulgating laws and regulations that encourage CE within procurement. The buyer should be willing to pay a premium for circular products or services; training is needed to address CE when drafting the agreement and during the technical and proposal evaluation. In regard to the bidders’ prequalification evaluation, a certain weight should be assigned to the adoption of CE. Furthermore, the bid–award system should give preferential treatment to circular materials or services.

The construction industry in Saudi Arabia represented around 5.5% of the gross domestic product (GDP) in 2019 and employed around 26.4% of the total workforce in the Saudi private sector; however, only 12.5% of the construction workers are locals. In 2020, unemployment has reached 15.4% among Saudi nationals. Concurrently, approximately 6.7 million workers in the Saudi private sector are non-locals. This paper investigates the challenges and opportunities of employing locals in the construction industry. A quantitative analysis of the public statistics is conducted to determine the genuine challenges and potential opportunities in replacing non-locals with locals in the construction industry. The analysis reveals that although most of the Saudi construction industry workforce (87.5%) are non-local, the construction industry practically can accommodate around 9.5% of unemployed Saudis annually based on the current distribution of unemployed Saudis and the construction labor market. The analysis, also reveals that most unemployed Saudis are college graduates with majors that do not fit to find, suitable jobs in the construction industry. Among the findings that the Saudi construction industry will continue to need a non-Saudi workforce. Furthermore, though most unemployed Saudis are college graduates, there is a shortage of Saudis with appropriate training and academic majors.

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