Asegun Henry has a bold idea to save the world. He believes the key to reducing carbon emissions, and mitigating further climate change, lies in our ability to box up the sun. Today, much of the renewable energy that’s captured from the wind and sun is delivered in a use-it-or-lose-it capacity. To store such energy, Henry envisions a completely sustainable, zero-carbon grid with the potential to supply all our electrical needs, even on overcast and windless days. And he has a blueprint for how to get there. Imagine, alongside…