"Science has spoken. There is no ambiguity in their message. Leaders must act. Time is not on our side. There is a myth that climate action will cost heavily, but inaction will cost much more." as stressed by the United Nations Secretary- General Ban Ki-moon during the press conference to launch the last IPCC 1 Synthesis Report last November in Copenhagen. Later this year, the Paris Conference on the Parties (COP21) 2 may lead to an international agreement to avoid global warming of more than 2°C degrees on average by 2100. To prepare for this key agreement, a common roadmap for all countries in the coming year is therefore required. This was the aim of the Lima Conference (COP20), last December when 195 UN countries tried to establish government commitments before the Paris Conference.