Utilization of renewable energy sources such as wind and solar can overcome environmental threats associated with fossil fuels. But expensive power producing and storage components are required to harness and store renewable energy. In addition renewable sources are intermittent, thus unreliable when used independently.
Hakizimana, Alphonse and Scott, Joseph, "Optimal Design of Hybrid Renewable Energy Systems" (2015). Chemical and Biomolecular Graduate Research Symposium. Paper 16.