Which of the following is NOT a measure to resolve the 21st century energy challenges?

Energy security remains a key component in realizing the vision of a Europe whole, free and at peace, said Vice President Joe Biden in his recent address to the Atlantic Council Energy and Economic summit.
    While there are serious energy challenges for many countries, it is also a unique moment for Europe to change their circumstances. As a matter of economic and national security, said Vice President Biden, "we need governments and the European Commission to work hand-in-hand with the private sector to ensure diversity in sources of fuel from hydrocarbons to renewables. "
     (3)This includes the pursuit of more reliable supply routes, development of new pipelines and liquefied natural gas facilities, and the promotion of regulatory and technology cooperation to address 21st century energy challenges. We must overcome remaining hurdles to complete projects like the Southern Gas Corridor, which will bring gas from the Caspian and potentially the eastern Mediterranean to European markets in less than five years.