Here is a bit more reference in terms of the energy we use on the planet:

To see how energy stitches the cosmos together, and how we fit within it, we now journey through the cosmic power scales of the universe, from atoms nearly frozen to stillness. To Earth’s largest explosions. From stars colliding, exploding, to distant centers of power so strange, and violent, they challenge our imaginations.

Today, energy is very much on our minds, as we search for ways to power our civilization and serve the needs of our citizens. But what is energy? Where does it come from? And where do we stand within the great power streams that shape time and space?

Humans today generate about two and a half trillion watts of electrical power. How does that stack up to the power generated by planet Earth? Deep inside our planet, the radioactive decay of elements such as uranium and thorium generates 44 trillion watts of power. As this heat rises to the surface, it drives the movement of Earth’s crustal plates, and powers volcanoes.

What do you think, will we ever be able to generate more energy here on earth in an efficient manner?