"This roadmap envisions that by 2050, geothermal electricity generation could reach 1 400 TWh per year, i.e. around 3.5% of global electricity production. Geothermal heat could contribute 5.8 EJ annually by 2050. For geothermal energy for heat and power to claim its share of the coming energy revolution, concerted action is required by scientists, industry, governments, financing institutions and the public." (Quoted from paper)