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The relationship between carbon emissions and economic growth is based on Environmental Kuznets Curve (EKC). The issues of global warming, environmental change, carbon dioxide (CO2) emissions, energy consumption (EC), and economic growth have concerned many countries. Hence, the present study uses the time-series method to verify the causality among gross domestic product, CO2 emissions, and EC in the developing ASEAN plus six countries, namely Singapore, Thailand, Indonesia, Malaysia, Vietnam, the Philippines, Brunei, Myanmar, Laos, Cambodia, China, Japan, Korea, New Zealand, Australia, and India, for the period 1980-2013. In this study, the unit root test of the three variables is carried out to determine whether each variable is stationary. If a variable has a unit root, it is non-stationary, and the multivariate co-integration analysis proposed by Johansen (1991) is then used to test whether there is a co-integration relationship among the variables. If the co-integration relationship exists, the vector error correction model (VECM) is used to modify the short-and long-term Granger causality that coexists simultaneously among the variables; however, if the relationship does not exist, the vector auto-regression (VAR) model is used to analyze the causality. The results show that EC plays an important role in economic growth in ASEAN plus six countries.