Green' energy RSD budgets include: energy efficiency, renewables, nuclear, hydrogen and fuel cells, other power and storage technologies, and other technology or research. While the United Kingdom remains a leader in marine energy innovations, its ranking declined in batteries, electric and hybrid vehicles, nuclear, methane, heating, solar, fuel injection and waste. However, the falls appear to be due to higher growth in patenting activity in emerging economies such as Korea, rather than a major decline in the UK.