https://viterbigradadmission.usc.edu/2017/07/problem-renewables-germanys-energiewende/
The Problem with Renewables and Germany's Energiewende - USC Viterbi | Prospective Students
Aug 10, 2017 - Posted: February 9, 2017, 6:22pm A year ago, renewable sources except for large hydropower plants contributed to one tenth of the worldwide power generation....
the problem with renewables