We are living in very exciting times when it comes to renewable energy. All over the world, countries are taking steps to generate more and more of their power from their wind, solar and hydropower resources, among other means of clean energy production. This expansion is not just vital for human and economic development, it’s key to the world’s efforts to tackle climate change. With less than six weeks to go until policy makers gather for the next UN Climate Conference of the Parties in Lima, Peru and as part of a series of events at the World Bank’s annual meetings, we hosted a panel of energy experts to look at what it will take to rise to the renewable energy challenge and address energy poverty.
In July, the U.S. Department of Energy and the Union of Concerned Scientists (UCS) released reports (see U.S. Energy Sector Vulnerabilities to Climate Change and Extreme Weather and Water-Smart Power: Strengthening the U.S. Electricity System in a Warming World) highlighting the energy sector’s vulnerability to future water constraints. The reports’ findings paint a worrisome picture: currently, 60% of coal power plants in the U.S. are experiencing water stress; hydropower is threatened due to more frequent and severe droughts; and energy infrastructure is endangered by water variability due to climate change.
Water is critical for producing power, and vice versa. Almost all energy generation processes require significant amounts of water, and the treatment and transport of water requires energy, mainly in the form of electricity. Even though the interdependency between water and energy is gaining wider recognition worldwide, water and energy planning often remain distinct. The tradeoffs involved in balancing one need against the other in this “energy-water nexus,” as it is called, are often not clearly identified or taken into account, complicating possible solutions.