An international summit on the future of energy security opens in London amidst disagreements over the role of renewables in satisfying the world's energy needs. The two-day meeting takes place amid global economic turmoil and trade wars. European countries believe that nuclear energy and renewables are the best way to avoid dependence on imported oil and gas, while OPEC believes in adding renewable energy sources to existing fossil fuels. The purpose of the IEA, which was established in 1974, is to promote the energy transition as a tool for energy sovereignty.