Ordinary Portland cement (OPC) is produced through energy-intensive processes and contributes to approximately 8% of global carbon dioxide emissions. As one of the most consumed materials after water, cement's environmental impact is substantial. Decarbonizing emissions in the intensive processes of cement production requires a sustainable supply of low-carbon resources. The purpose of this study is to explore the potential of agricultural waste ashes as supplementary cementitious materials (SCMs) to reduce the carbon footprint of OPC. In Africa, where agricultural waste is abundant, these residues could offer a sustainable solution for cement manufacturing. This study employed a multi-criteria decision analysis methodology to identify and select relevant literature for analysis. The review reveals that incorporating agricultural-based SCMs, such as rice husk ash, coffee husk ash, sugarcane bagasse ash, and palm oil fuel ash, into cement production can significantly reduce clinker requirements, thereby lowering carbon dioxide emissions while maintaining performance standards of OPC. The review found that locally sourced waste materials can reduce the carbon footprint of cement by up to 40%. Transitioning from a clinker-dependent sector to a bio-based one presents several opportunities as well as challenges for the African cement industry, but it is critical for reducing carbon emissions and improving sustainability. This approach not only decreases emissions but also supports sustainable construction, aligning with global climate goals and sustainable development goals (SDGs) 12 (responsible consumption and production) and 13 (climate action). Adopting green cement could revolutionize the African cement industry, promoting resource efficiency and sustainable development across the continent.

In Kenya, the last few years has seen the performance of companies listed under the commercial and services segment on the Nairobi Securities Exchange (NSE), experience mixed fortunes. The study sought to assess the implications of financial risk on the performance of these companies. The study applied explanatory research design. The target population were the 14 companies listed under this segment of NSE. Secondary panel data contained in published annual reports for the period 2013–2017 was collected. Panel regression model was applied with the random effect model being used based on the Hausman specification test. Findings showed that credit risk had an insignificant positive effect on return on equity (ROE) while liquidity risk had a significantly negative effect on ROE and operational risk had a positive insignificant effect on ROE. The positive coefficients from the data analysis indicated that commercial and service companies at NSE were able to take in more credit to boost performance of these companies however the negative coefficients shows that within the period of study these companies experienced high liquidity problems in that the current liabilities exceeded the current assets. Thus, concluding that these companies were unable to pay all their obligation when they were due.

The cement industry contributes significantly to local economies by creating jobs and supporting industries such as healthcare, education and transportation. While cement contributes to development and economic growth, it also poses serious risks to the natural environment and human health. A systematic literature review based on a bibliometric analysis was conducted. The search focused on studies related to the cement and construction industries, circular economy, sustainability approaches, and impacts of cement and concrete. A refined key word search was used to select articles from the Scopus database. This resulted in a final selection of 197 documents that fit the inclusion criteria. While most of the circular economy research studies reviewed offered technical solutions such as optimizing efficient production processes or recycling materials, there were fewer studies that examined the socio-economic and governance dimensions of circular economy practices, hence the knowledge gap. To supplement this, case studies from cement companies globally were reviewed to provide practical solutions that can facilitate the transition to circular economy practices while ensuring social justice considerations for local communities. Reviewed studies found a positive association between presence of cement plants and economic growth of local communities but negative associations between exposure to cement plants, the natural environment and human health. This review highlights the significant need to integrate socio-economic and environmental dimensions into sustainability efforts and inform policymakers about these impacts to develop long-term sustainable practices. Achieving this balance is critical to maximizing benefits and minimizing harm in local communities affected by cement production.

The study sought to assess the financial performance of the companies listed in the commercial and services sector at the Nairobi Securities Exchange (NSE), Kenya with an aim of determining the implications of firm size and operational risk on their performance. It was anchored on the agency theory. The study applied explanatory research design and the target population was the 14 companies listed under this sector. Secondary panel data contained in published annual reports for the year 2013 to 2017 was collected. A panel regression model was applied with the random effect model being used based on the Hausman specification test. Findings showed that operational risk had a positive insignificant effect on performance as proxied by return on assets (ROA). The findings further showed that firm size had a moderating effect on the relationship between operational risks and performance. It concluded that firm size played a role in the risk management of a company i.e. companies with higher total assets managed risk better than their counterpart. The study recommends that for companies to record improved financial performance, they needed to manage their operational risks by implementing risk management initiatives and increasing their total assets base.