In its latest Energy [R]evolution scenario, Greenpeace gives an optimistic outlook for renewables' ability to diminish the risks of climate change from CO2 emissions. While the economic crisis has driven down profits, renewables are now 'directly competitive with heavily subsidised conventional generation in an increasing number of markets,' the report states. The authors now argue for a 'transformation', to a flexible system based on a wide variety of renewables. While the shift will require new infrastructure and storage, there are 'no real technical or economic barriers' to be overcome. 'It is the lack of political will that is to blame'.