On April 17, U.N. Framework Convention and Climate Change Executive Secretary Christiana Figueres gave the keynote speech at the Navigating the American Carbon World conference in San Francisco, highlighting the importance of linking different carbon trading systems across the globe. At the conference, public officials from California and Quebec discussed plans to link their governments’ respective greenhouse gas emissions trading programs at the Navigating the American Carbon World conference in San Francisco. The California Air Resource Board began consideration of regulations tying the programs together on April 19. Representatives from British Columbia also expressed interest in adopting a cap-and-trade program to be linked with other regional programs.