Hal Harvey

“Since 2010, the price of electricity from utility-scale solar farms has fallen almost 90 percent. Onshore wind fell 60 percent in the same time. Advanced batteries, which power electric cars and are increasingly finding a role in balancing fluctuations on the electric grid, fell more than 80 percent. When highly efficient light bulbs made with light-emitting diodes, or LEDs, first came out just over a decade ago, you could easily pay $50 for one; nowadays they sell at Home Depot for $1.24 apiece, a decline of 97 percent.”
― Hal Harvey, The Big Fix: Seven Practical Steps to Save Our Planet