The way MinEnergia talks about the growth of renewable energy you might have thought those “green” electrons were already coursing through the network, elbowing less virtuous ones out of their way. As if in some corny animated ad from the early 1960s, we might see them popping out of the wall socket: bright green for wind and solar electrons, blue for hydroelectric electrons and dirty grey for the fossil fuel generated particles. But no. Not yet. Or at least you would stare at your cartoon wall socket a long time waiting for a green electron.