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The role of green and sustainable finance is crucial as the global economy, marked by increasing energy demands and environmental concerns, the need for creative solutions to meet humans need and create a better future for all, transitions towards a low-carbon, sustainable, and resilient future. This study examines the impact of green finance on the economic prosperity of the Sahel from 2001 – 2022. Descriptive statistics, boxplots, cointegration tests, and Vector Error Correction Model (VECM) analysis, were utilized to explore the interplay between the variables with the aid of EViews software. The results reveal the growth patterns of GDP, EGLC, POP, INFL, CO2 and FDI, and their significance in driving economic expansion in the Sahel. This study concludes with actionable insights and recommendations for Sahel policymakers to address energy poverty, energy transition, demographic trends, climate change, investments, financing, institutional quality, and other economic issues.

The development of agricultural waste–doped fired bricks is an important step toward achieving lightweight eco-efficient bricks with improved thermal insulation property. Recent research in masonry has been tailored towards the production of energy-efficient building by incorporating waste materials as additives. This effectuates a safe waste disposal, cost effectiveness, and also serve as a giant stride towards environmental sustainability. This study examines the viability of using walnut shell as additive in fired clay at various firing temperatures. Pulverized walnut shell was added to clay at a proportion of 0–10 wt.% by weight of clay. The samples were fired at temperatures of 950 °C and 1100 °C. The samples were probed for mechanical properties and durability. Morphology of the brick samples were examined under scanning electron microscope. The result of the research showed increased water absorption and specific heat capacity while mechanical and bulk density were observed to reduce. Linear shrinkage and thermal conductivity reduced with increase in walnut content of which linear shrinkage and thermal conductivity values experienced at 1100 °C was higher than at 950 °C. Resistance of bricks to salt crystallization increased with firing temperature. All samples met various standard requirement for masonry except sample prepared with 10 wt.% walnut shell whose compressive and flexural strengths fell below the required standard. The study established the use of walnut shell for development of sustainable energy-efficient bricks.