energy return / non-renewable energy supplies / energy investment / oil and gas / excess electricity / photovoltaic systems / energy shocks / energy systems / renewable energy systems / conventional energy / electricity / inexhaustible renewable energy source / energy storage / oil / energy options / renewable energy sources / gas and oil / individual systems / outdated lifecycle energy data / storage systems / electricity grid / equivalent primary energy / energy / /
Organization
University of the West of England / European Commission DG Environment News Alert Service / US Federal Reserve / European Commission / / /
20 July[removed]Modern photovoltaic systems provide competitive energy returns Most modern societies depend on fossil fuels (oil, gas and coal) as sources of energy for development and growth. Switching to renewable energy