Specifically love this here:

“Solar and wind capture are already advancing on exponential curves, installation rates regularly doubling and costs falling.  Even without the subsidies, the costs of U.S. solar installations could be halved by 2022, reducing the returns on investments in homes to less than four years.  By, 2030, solar capture could provide 100 percent of today’s energy; by 2035, it could be free—just as cell-phone calls are today.”

Source: 2015 was a tipping point for six technologies that will change the world | Vivek Wadhwa | LinkedIn