This study investigated the environmental sustainability of economic growth: a Panel data analysis in East Africa for the period 1990-2020 And we use of OLS estimation, Fully Modified Least Squares (FMOLS), and the outcome of Descriptive statistics reveal the typical magnitudes, standard deviations, and ranges of variables such as ecological footprint (EF), carbon dioxide (CO2), biocapacity (BC), foreign direct investment (FDI), gross domestic product (GDP), and population. EF has an average of 17.15 with a low standard deviation, suggesting proximity to the mean. CO2 exhibits higher variability, with a range from -3.330 to 11.691. Similar patterns are observed for BC, FDI, GDP, and population. Correlation analysis reveals relationships, with positive correlations between EF and CO2, EF and population, CO2 and population, and BC and EF. Negative correlations exist between EF and GDP and CO2 and GDP, suggesting potential trends in the associations between ecological impact, economic development, and population dynamics. The Kao Residual Cointegration Test indicates that the variables in the analysis may be stationary after differencing, a crucial condition for cointegration. The p-values associated with residual V and HAC V are both less than 0.05, providing statistical significance and evidence against the null hypothesis of no cointegration. The overall low p-value (0.0004) for the Kao test further supports the rejection of the null hypothesis, suggesting the presence of cointegration among the variables. For biocapacity (BC) and foreign direct investment (FDI), individual intercept and trend co-integration tests show significant evidence.