20 years is still an optimistic expectation. Renewables only account for about 13% of energy demand in the US. The market is valued at around 900 billion dollars today and is expected to grow to around 2 trillion in 2030.so that's about double the current size. So that means by 2030 renewables will account for perhaps 30% of all energy demands. And thats assuming our energy needs don't keep increasing as they're likely to do. So we're nowhere near ending our dependency on fossil fuels.