This graph shows clearly that solar and wind energy have been consistently underestimated year after year (the red line in the picture). The leading energy institution in the world, the International Energy Association (IEA) in Vienna (black lines) has been wrong for 20 years. Greenpeace (green line) has been closest but even they have not been able to correctly forecast the rapid rise of renewable energy. Two new reports predict that solar and wind are, yet again, going to continue to surprise us.