[Voiceover] Renewables are great but right now

they can't meet the worlds energy needs

even though coal is filthy and dangerous

we can't give it up.

One possibility for cleaner coal, carbon capture

and storage technology.

It's a process that would separate the carbon dioxide out

of coal emissions and send it underground for centuries.

The problem is CCS is volatile, largely untested

and extremely expensive but our future depends

on solving it.

(upbeat drumming)