Meeting that commitment will require rapid transition from fossil fuels to renewable energy sources such as solar, wind, geothermal, hydropower, and ocean power. Energy consumption is currently highest in developed countries, but the biggest consumers include large emerging economies, prominently China and India. Rapid increases in energy use are projected in other developing countries if poverty reduction strategies are successful, many of these countries are pursuing more sustainable energy supplies and end-uses (Leach 2015, Pearl-Martinez 2014, OECD 2007).