Renewables prices have been falling precipitously over the past five years as government research and incentives have encouraged and excited deployment. There has been exponential growth, firstly with wind and now solar, throughout the world with China and the United States currently leading global solar growth.
Clean energy advocates and reporting entities such as Ceres and Bloomberg New Energy Finance claim that the world needs $500 billion to $1 trillion dollars invested annually if we wish to stave off the harshest consequences of climate change and keep global average temperature increases below 2 degrees centigrade.
But, given that deployment is up and investment is down for the second year in a row, should we be using investment dollars as the proper metric when determining what is “enough?” Or, should advocates, governments, and businesses be using another metric, such as megawatts deployed, or tons of CO2 avoided by renewables generation?
DISCUSSION: What metric should be used to measure clean technology deployment: investment dollars? Megawatts installed? Or tons of CO2 avoided?
Authors: Brandon Tarbert, Eric Shrago