At the fifth summit of the Americas, on 18 April, President Obama invited countries of the region to participate in an Energy and Climate Partnership; "a voluntary and flexible framework for advancing energy security and combating climate change". Countries would be encouraged to suggest ideas for cooperation, including on energy efficiency, renewable energy, cleaner fossil fuels and energy infrastructure. President Obama also asked Secretary of Energy, Chu, to advance further cooperation with his counterparts this June in Peru at the Americas Energy Symposium.