Other events held during SIEW 2010 included Carbon Forum Asia, Clean Energy Expo Asia, IPEC (International Power and Energy Conference) 2010, Platts Top 250 Awards Dinner, Singapore Electricity Roundtable, Bloomberg New Energy Finance Dinner and Downstream Asia. The fourth Singapore International Energy Week (SIEW) took place from 31 October to 4 November 2011.  20,000 people and 550 exhibitors participated in the event, including government officials, business leaders, academics, investors, as well as representatives from energy-resource and environmental companies from 60 countries. On 31 October, former executive director of the International Energy Agency Nobuo Tanaka delivered the Singapore Energy Lecture, where he shared his "21st century energy security" vision and called for Asia's emerging economies to engage in more active collaborations for the future. He noted that one country cannot enhance its energy security by risking the energy security of others, and thus the need for a new framework on energy security. The Lecture was followed by the Singapore Energy Summit, where global energy leaders took the stage to discuss pertinent energy issues. Sharing the stage for the first time were the CEOs of Royal Dutch Shell and Petrobras, Peter Voser and José Gabrielli respectively, as they discuss the future of the global energy industry. According to Peter Voser, Shell expects Asia to be a key growth region in the long term. However, energy leaders at the Singapore Energy Summit also stated that Asia faces a rocky road ahead in securing energy needs. Giving their perspectives on energy security concerns and new trends in the power industry at the Singapore Energy Summit, Singapore's Second Minister S. Iswaran, Malaysia's Dato' Sri Idris Jala, and the Philippines' Secretary of Energy Jose Rene Almendras unanimously agreed that a connected Asean power grid was a crucial step for energy security in the region. Such a grid, to be done in phases, would integrate Asean's energy markets, and would require investments into trans-Asean gas pipelines and expanding connections between member countries. Minister S. Iswaran also stated that such plans needed clear political direction at the regional and national levels, adding that an Asean energy grid would serve individual national interests as well as the region as a whole. The annual energy gathering also hosted three new major events, PV Asia Pacific Expo, Asia Smart Grid and the EMART Asia, covering a range of issues including energy efficiency, renewable energy and energy trading. Returning to SIEW this year were Clean Energy Expo Asia, Carbon Forum Asia, Downstream Asia, Singapore Electricity Roundtable, and the Platts Top 250 Global Energy Companies Asia Awards Dinner.