Telegraph: Saving the planet is busy work. When Mark Shorrock came to update investors in his clean-tech incubator fund Low Carbon Accelerator recently, he was amazed to see that he had investigated 448 alternative energy hopefuls in the last year. From greener fridges to concentrated solar power, even biofuels from algae, LCA is at the sharp end of an explosion in technological innovation against which the dotcom years pale. It’s not just a techie thing either – the money men are …