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Background: Renewable energy (RE) has been talked about for more than 30 years while there is an increased use of fossil fuels accompanied by subsequent negative environmental impacts and supply decline. This study explores the linkages between renewable energy and energy efficiency in ensuring an eco-friendly environment in Nigeria. Four independent variables (economic growth, fossil fuel energy consumption, renewable energy consumption, and population) were examined using time series data from 1981 to 2013 with pollution (CO 2 ) emission as an indicator (dependent variable) for environmental degradation. The study also emanates with the view of proffering policies on how the use of renewable energy resulting in energy efficiency instead of the traditional fossil fuel can be used to sustain the environment.

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