Many people have probably heard that it's getting cheaper to install rooftop solar panels in the US. But that's just part of an even bigger trend. Since 2010, the cost of renewable energy has been plummeting all over the world.
February 5, 2015
Many people have probably heard that it's getting cheaper to install rooftop solar panels in the US. But that's just part of an even bigger trend. Since 2010, the cost of renewable energy has been plummeting all over the world.