Matt and Sean talk "massless" batteries, and how to tell if some of those apples you're comparing might actually be oranges. Or bananas.

Matt and Sean talk about molten metal batteries, how they may solve some power storage issues, and why their pace of development is slow.

Matt and Sean talk about possible advances in sustainable tech--even though the big picture project may be a pipe-dream--and what elements of that dream might even be truly crucial in the future (hint: there's salt in your water).

Matt and Sean talk about modular and panelized homes, if it’s an affordable path to net zero, Matt’s journey to his own modular home, and reaching 500,000 subscribers.

Matt and Sean talk about Mycelium Fungus, if it’s a good replacement for plastic, whether it might be a technology that will grow on us, and will we eat it or stick to cow.

Matt and Sean talk about space mining, the costs, the challenges, and if we’ll see it in our lifetimes. And we also talk about tidal turbines and how well they’ll stand up to the maintenance challenges.

Matt and Sean talk about water pipe turbine generators, turning your toilet into a power source, and the incredible number of ways we can turn wasted energy into electricity.

Matt and Sean talk about EV recycling research that could grow to a second source of critical battery components and help revitalize economically depressed cities in the US.

Matt and Sean talk about “bladeless” wind-powered electricity generation, and the inspiring (and awkward) design concepts behind them.

Matt and Sean discuss how the aesthetics of solar tiles might not find a mass market place if panels start to be an everyday item. Also: is the cost really out of control in the US?