Raw Materials: Hidden Carbon Costs of Utility-Scale Renewable Energy
No energy source is without its impacts, but considering how much steel and concrete is needed to construct utility-scale solar and wind facilities, we may be adding more greenhouse gas emissions than necessary. When most people in the United States think about clean energy, they picture facilities that are inherently not green -- solar facilities in the desert or gigantic wind turbines on hillsides tethered to our cities by hundreds of miles of costly transmission lines. These industrial facilities require amounts of materials and construction processes that make them unsustainable choices to replace dirty coal. When it comes to clean energy, nothing beats the efficiency and "green" of distributed energy , such as solar panels on rooftops or over parking lots, which require less of the materials that require carbon emissions to produce and transport. Take a look at BrightSource Energy's Ivanpah Solar Electric Generating System in the northeastern Mojave De...