I think people fail to grasp the weight of the situation most of the time. The photons left the star ~few million years ago. The only reason there is life on earth is that there is an gradient of energy between the sun and outer galaxy. Yes, earth managed to store a few billion petawatts through photosynthesis. But we are now a bare society nearly with out any reserves. Every friking atom in your body was initially charged by that fusion - and now the stored photons are running low and we are just scrambling to figure out where to get more.