1. Key Renewables Trends, Excerpt from: Renewables Information;IEA,2015
2. Renewable Energy Outlook;IEA,2013
3. The Hydrogen Economy: Opportunities and Challenges;Ball,2009
4. Fossil Fuels Just Lost the Race against Renewables;Randall,2015
5. Technology Roadmap: Hydrogen and Fuel Cells;IEA,2015