When you walk out your door today, it may be sunny, it may be windy, the waves may be crashing against the shores with an awesome fierceness. Or, you know, none of those things might be happening.

And therein lies one of the fundamental issues with renewable energy, its unpredictability.

But one thing that won’t happen when you go out there this morning is that you won’t float off into the air. Gravity is reliably keeping your feet on the ground and it will continue to do so ad infinitum.

So couldn’t we use this persistent force in some way to solve our energy woes?

Jill MacPherson is Senior Test & Simulation Engineer with Gravitricity - she joins Jonathan to discuss.