Before revision:  The conclusions are that reducing fossil fuel consumption may hamper economic growth, and that it is unlikely that nonfossil energy will substantially replace fossil fuels . This paper also examines causal linkages between the variables using a trivariate model, and obtains the same results as those from the bivariate model .
After revision:  The conclusions are that reducing fossil fuel consumption may hamper economic growth, and that it is unlikely that nonfossil energy will substantially replace fossil fuels .