In the face of rapidly dwindling carbon budgets, negative emission technologies are widely suggested as required to stabilize Earth’s climate. However, finding cost-effective, socially acceptable, and politically achievable means enable such remains a challenge. We propose solutions based on facilitate wealth creation for stakeholders while helping mitigate climate change. This paper comes up w...

the main purpose of this paper is to evaluating the effects of some methodological problems and issues on the estimates of return rate of education to achieve accurate and reliable figures. after intensively and critically reviewing the empirical studies, opportunity cost, selectivity and endogeneity and the hierarchical structure of data have been recognized as critical problems and issues dom...